Missed opportunities for prenatal family-centered care during the COVID-19 pandemic: a qualitative study.

BACKGROUND: The purpose of this study was to describe the impact of COVID-19 on fatherhood experiences during pregnancy. METHODS: A semi-structured interview guide was developed to collect qualitative data from fathers about their experiences in pregnancy and prenatal care, how they communicated with providers, strategies for information seeking, and social support they received during the pregnancy. One-time, virtual interviews were conducted via Zoom with fathers that were either expecting a baby or fathers who had a baby after March 2020 and were 18 years or older. Thematic analysis was used to identify themes that highlighted the fatherhood experience. RESULTS: In total, 34 interviews with new or expectant fathers were completed. Two central themes that highlight the experiences of fathers: missed opportunities to shift toward family-centered care and inequity in the parent dyad during pregnancy. Additional supporting themes included: limited patient-provider relationship, lack of telemedicine use, inadequate uncertainty management for parents, unidirectional information sharing between parents, and limited opportunities for achieving role attainment during pregnancy. CONCLUSION: The COVID-19 pandemic created a decision point for prenatal care. Instead of focusing on family-centered practices, prenatal care exclusively centered on the mother and fetus, resulting in problematic experiences for fathers including limited access to information about the pregnancy and health of the mother and fetus, heightened stress related to COVID-19 safety requirements, and few opportunities to attain their role as a father. Prenatal care should actively seek robust strategies to improve family-centered care practices that will withstand the next public health emergency.

Perinatal Health Profiles Associated With Removal From the Home and Subsequent Child Protective Services Report in Maltreated Infants.

Infants face the highest risk of abuse and neglect nationally. There is a compelling need to understand the individual risk factors and needs of families of maltreated infants so that prevention efforts can be tailored for optimal effectiveness. Using linked birth certificate and CPS records data, we employed latent class analysis to identify distinct profiles of perinatal health factors associated with infant maltreatment. Classes were then regressed onto two key child welfare outcomes-removal from the home and re-report. Results indicated 10 latent classes primarily associated with supervisory neglect and presumed prenatal substance exposure. Rapid repeat pregnancy, smoking during pregnancy and inadequate prenatal care emerged as key risk factors. Presumed substance exposure was associated with high risk of removal from the home and low risk of re-report. The opposite was found for supervisory neglect. Substantial variation existed across classes and types of maltreatment, suggesting a need for tailored prevention strategies.

Qualitative Research to Describe Food Bank-Health Care Partnerships: What Types of Models are Currently Being Used to Facilitate Food Bank-Health Care Partnerships in Texas?

BACKGROUND: Food banks and health care are being increasingly called on to partner together to support individuals and families experiencing food insecurity, yet few published works highlight descriptions of current food bank-health care partnerships. OBJECTIVE: The aim of this study was to identify and describe food bank-health care partnerships, the impetus for development of partnerships, and challenges to sustainable partnerships within a single-state area. DESIGN: Qualitative data collection using semi-structured interviews was performed. PARTICIPANTS: Twenty-seven interviews were completed with representatives of all 21 food banks in Texas. All interviews were between 45 and 75 minutes and completed virtually using Zoom. MAIN OUTCOME MEASURE: Types of models used for implementation, impetus for partnership development, and challenges to partnership sustainability were identified through interview questions. STATISTICAL ANALYSIS PREFORMED: Content analysis was performed in NVivo (Lumivero. Denver, CO), using transcriptions from voice-recorded semi-structured interviews. RESULTS: Four types of models of current food bank-health care partnerships were identified; they included food insecurity screening and referral, emergency food distribution at or near health care partner, pop-up food distribution and health screenings in community settings, and specialty programs for patients referred by health care. The impetus for partnership formation most often came from pressures from Feeding America or the belief that partnerships provided an opportunity to reach individuals and families that were currently not being served by the food bank. Challenges to sustainable partnership included lack of investment in both physical capacity and staff, administrative burden, and poorly developed referral processes for partnership programs. CONCLUSION: Food bank-health care partnerships are forming in diverse communities and settings, yet they need significant capacity building to support sustainable implementation and future growth.

Validation of Self-Reported Attachment Classification Among Racially and Ethnically Diverse Parents of Young Children.

BACKGROUND: The Attachment Style Questionnaire (ASQ) was developed to measure individual differences in insecure adult attachment and was suitable for populations that may have minimal or no experience in romantic relationships. The measure was previously validated on homogenous populations. OBJECTIVES: The purpose of this study was to verify construct validity and internal consistency of the ASQ among an ethnically and racially diverse sample of caregivers of young children ages birth to 3 years. METHODS: Using a cross-sectional design, we examined the psychometric properties of the ASQ. A racially and ethnically diverse sample of caregivers of young children (birth to 3 years old) completed the 40-item measure. Factor analyses and internal consistency analyses were conducted. RESULTS: Confirmatory factor analyses showed that the previously published factor structures were not a good fit for this diverse sample. Exploratory factor analysis with promax rotation revealed a four-factor solution among 16 items, including relationship anxiety, relationships as secondary, discomfort with closeness, and relationship distrust. Adequate internal consistency was noted for the factors, and structural invariance was confirmed across Hispanic and non-Hispanic ethnicities. DISCUSSION: Nurse scientists and practitioners should take caution when using or developing indices based on previous research. There should be consideration of structural stability and replication across the intended population.

Opportunities and challenges for family-centered postpartum care during the COVID-19 pandemic: a qualitative study of nurse perspectives.

BACKGROUND: The global COVID-19 pandemic has forced the health care sector to make wide-ranging changes to protect patients as well as providers from the risk of infection. Many of these changes are likely to have greatest impact in contexts of care that employ family-centered care (FCC) models, including perinatal and maternity care. Research conducted in perinatal care settings during the pandemic has shown that some of these restrictions have negatively impacted patient and family experiences and outcomes, while others have been perceived as beneficial. The present qualitative study aimed to understand what changes have occurred in postpartum nursing practice during the pandemic, and how these changes have affected nurses, women and families during their stay in the hospital following a new birth. METHODS: Structured interviews were completed with 20 postpartum nurses from five hospitals across Texas. The interview protocol was designed to elicit information about changes to hospital policies in postpartum units during the pandemic, nurses' attitudes about these changes, perceived benefits and challenges for performance of their duties, and perceived effects on patients and their families. Nurses were recruited for the study using a purposive sampling approach. Interviews were conducted by video conference using Zoom and lasted approximately 30 to 45 min. Data were analyzed using a qualitative descriptive approach. RESULTS: Participants reported that their hospitals placed restrictions on the number and mobility of support persons allowed to stay with the mother in the unit and prohibited all other visitation. Some challenges of these policies included reduced opportunities for hands-on learning and an increased number of patients opting for early discharge. Perceived benefits for patient education and outcomes included improved frequency and effectiveness of nurse-family communication, increased father involvement, and greater opportunities for maternal rest, breastfeeding, skin-to-skin care and family bonding. CONCLUSIONS: Study findings suggest that some limitations on postpartum hospital visitation may achieve important, family-centered goals. Protected time for family-bonding, maternal rest, breastfeeding, father involvement and individualized education are critical to quality FCC. Research must examine which visitation policies maximize these benefits while preserving patient access to family and social support.

Trends in Abusive and Nonabusive Injury Hospitalizations in Young Children in Texas, 2004-2018.

Hospitalization data provide context to understanding abusive and non-abusive injuries and how these hospitalizations change over time. The purpose of this study was to utilize Texas inpatient hospitalization data to assess age-related differences among infants (<12 months of age) and toddlers (12-59 months of age) in injury trends and patterns of injury among abusive and non-abusive hospitalization encounters over a 15-year time period. For both age groups, pediatric hospitalizations for non-abusive injuries decreased significantly over time; however, hospitalizations for abusive injuries did not. Compared to non-abusive injury hospitalizations, abusive injury hospitalizations were statistically more likely to involve more body regions and were associated with fractures, internal organ injuries, and superficial wounds. Abusive injury hospitalizations had longer lengths of stay and resulted in higher illness severity scores. Toddler injury hospitalizations were associated with most of the body regions, with the exception of traumatic brain injury for which the odds of hospitalization were higher for infants. This study confirms the persistence of abusive injury hospitalizations and the age-related susceptibility to certain injuries comparing infants and toddlers. The findings reflect the clinical documentation and decision making of pediatric practitioners in a large state over 15 years and inform the trends in identification of injuries which are most common and consistent by age and intent.

Implementing food bank and healthcare partnerships: a pilot study of perspectives from charitable food systems in Texas.

BACKGROUND: Partnerships between charitable food systems and healthcare systems have been forming across the country to support individuals and families experiencing food insecurity, yet little research has focused on these partnerships, particularly from a food bank perspective. The objective of this exploratory pilot study was to identify implementation challenges and facilitators of charitable food system and healthcare partnerships from the food bank perspective. METHOD: Texas food banks with existing food bank/healthcare partnerships were identify through website review and support from Feeding Texas. Interview questions were tailored to each interview, but all focused on identify program components of the food bank/healthcare partnership and implementation barriers/facilitators of the partnership. In total, six interviews were conducted with food bank/healthcare partnership leaders (n = 4) and charitable food system experts (n = 2) about their experiences of working with food bank/healthcare partnerships. All interviews were completed via Zoom and took between 30 and 60 min to completed. Detailed notes were taking during each interview, and immediately discussed with the complete research time to formulate broad implementation themes. RESULTS: Interviews suggest unique implementation challenges exist at all levels of food bank/healthcare partnerships including the partnership, program, and system levels. Partnership-level implementation challenges focused on issues of partnership scale and data collection, sharing, and analysis. Program-level implementation challenges focused on food and produce expectations. Structural-level implementation challenges included issues of food safety, subsidized food regulations, and patient privacy. Implementation facilitators included leadership support, mission compatibility/organizational readiness, food insecurity training, and identify of partnership champions. CONCLUSIONS: This study adds to the growing interest in food bank/healthcare partnership as it highlights unique implementation challenges and facilitators for cross-sector partnerships between healthcare systems and community-based charitable food systems. Ultimately, we believe that collaborative discussion among leaders of charitable food systems and healthcare systems is needed to overcome outlined implementation challenges to better facilitate sustainable, equitable implementation of food bank/healthcare partnerships.

NICU and postpartum nurse perspectives on involving fathers in newborn care: a qualitative study.

BACKGROUND: Perinatal care nurses are well positioned to provide the education and support new fathers need to navigate the transition to fatherhood and to encourage positive father involvement from the earliest hours of a child's life. To effectively serve fathers in perinatal settings, it is important to understand the attitudes, beliefs, and behaviors of healthcare providers that may encourage and engage them, or alternatively alienate and discourage them. METHODS: This qualitative study involved structured interviews with ten NICU and postpartum nurses from hospitals in two large Texas cities. The interview protocol was designed to elicit descriptive information about nurses' attitudes and beliefs, sense of efficacy and intention for working with fathers, as well as their father-directed behaviors. Nurses were recruited for the study using a purposive sampling approach. Interviews were conducted by telephone and lasted approximately 25 to 35 min. Data were analyzed using a qualitative descriptive approach. RESULTS: Overall, study participants held very positive subjective attitudes toward fathers and father involvement. Nevertheless, many of the nurses signaled normative beliefs based on race/ethnicity, gender, and culture that may moderate their intention to engage with fathers. Participants also indicated that their education as well as the culture of perinatal healthcare are focused almost entirely on the mother-baby dyad. In line with this focus on mothers, participants comments reflected a normative belief that fathers are secondary caregivers to their newborns, there to help when the mother is unavailable. CONCLUSIONS: Nurse attitudes and practices that place mothers in the role of primary caregiver may be interpreted by fathers as excluding or disregarding them. Further research is needed to validate the results of this small-scale study, and to assess whether and how provider attitudes impact their practices in educating and engaging fathers in newborn care.

The prenatal triad: The importance of provider-patient communication with expectant fathers throughout the prenatal care process.

Previous research has primarily focused on the relationship between providers and expectant mothers as a key element of quality prenatal care. Significantly less attention has been directed toward expectant fathers and the importance of their communication with prenatal care providers and involvement in the prenatal care process. Much of this limited existing literature emphasizes the health benefits including fathers would bring for mom and baby, but rarely is the potential benefit to fathers' health included in the conversation. This discussion aims to highlight the value of this line of research for both communication and medical researchers and consider potential avenues for studying and promoting father engagement in prenatal care.

The association between newborn screening analytes as measured on a second screen and childhood autism in a Texas Medicaid population.

Autism (or autism spectrum disorder [ASD]) is an often disabling childhood neurologic condition of mostly unknown cause. We previously explored whether there was an association of ASD with any analyte measured in the first newborn screening blood test. Here we explore the second screen. Our matched case-control study examined data on 3-5 year-old patients with any ASD diagnosis in the Texas Medicaid system in 2010-2012. Subjects were linked to their 2007-2009 newborn screening blood test data, which included values for 36 analytes or analyte ratios. Data were available for 3,005 cases and 6,212 controls. The most compelling associations were evident for fatty acid oxidation analytes octanoylcarnitine (C8) and octanoylcarnitine/acetylcarnitine (C8/C2). Their adjusted odds ratios comparing 10th versus first analyte deciles were between 1.42 and 1.54 in total births, term births, and males. C8 was consistent with first screen results. Adipylcarnitine (C6DC), an organic acid analyte, showed opposite results in the two screens. Several other analytes exhibiting significant associations in the first screen did not in the second. Our results provide evidence that abnormal newborn blood levels of some carnitines may be associated with risk of later ASD, possibly related to their involvement with mitochondrial function in the developing brain.

Maternal comorbidity index and severe maternal morbidity during delivery hospitalizations in Texas, 2011-2014.

BACKGROUND: Severe maternal morbidity (SMM) prevalence was 194.0 per 10 000 deliveries in Texas in 2015. Chronic, behavioral, and pregnancy-induced conditions, as captured by a maternal comorbidity index, increase the risk for delivery-related morbidity and mortality. The objective of the study was to examine the association between maternal comorbidity index and SMM among delivery hospitalizations in Texas. METHODS: Delivery-related hospitalizations among Texan women aged 15-49 years were identified using the 2011-2014 Texas all-payer inpatient hospitalization public use data files (n = 1 434 441). The primary outcome of interest was SMM, based on the Alliance for Innovation on Maternal Health's coding scheme. The exposure of interest was a maternal comorbidity index. Multivariable logistic regression model was used to examine the association between maternal comorbidity index and SMM. RESULTS: SMM prevalence remained consistent between 2011 and 2014 (196.0-197.0 per 10 000 deliveries, P > .05; n = 1 434 441). Nearly 40% of delivery-related hospitalizations had a maternal comorbidity index of at least 1, and the proportion of deliveries in the highest risk category of comorbidity index (≥5) increased by 12.0% from 2011 to 2014. SMM prevalence was highest among the youngest and oldest age groups. With each unit increase in maternal comorbidity index, the odds of SMM increase was 1.43 (95% CI 1.42-1.43). CONCLUSIONS: Maternal comorbidity index is associated with SMM; however, the low predictive power of the model suggests that other, unmeasured factors may influence SMM in Texas. These findings highlight a need to understand broader contextual factors (practitioner, facility, systems of care, and community) that may be associated with SMM to reduce maternal morbidity and mortality in Texas.

Paternity establishment at birth and early maltreatment: Risk and protective effects by maternal race and ethnicity.

BACKGROUND: Minority race/ethnicity, low socioeconomic status, and lack of established paternity have been identified in previous research as risk factors for child maltreatment. However, given vastly different patterns of income distribution, single parenting and co-parenting across racial and ethnic populations, it is difficult to know which of these factors contribute most to maltreatment risk. OBJECTIVE: The current study explores whether the odds of maltreatment differ across race/ethnicity when paternity is not established at birth after controlling for maternal socioeconomic status. METHODS: Using merged birth certificate and child protective services records for children born between 2009 and 2011 in Texas (N = 1,175,804), we conducted multiple logistic regression analyses testing the main effects of maternal race and lack of established paternity, as well as the interaction of the two, on substantiated maltreatment. RESULTS: Results show that children of black mothers were less likely to have established paternity and more likely to experience maltreatment compared with other groups. However, the odds of maltreatment were lower for children of black mothers without established paternity compared to children of white mothers without established paternity (OR = .71, 95% CI [0.67,0.75]). Alternatively, the odds of maltreatment were higher when paternity was not established at birth for Hispanic mothers (OR = 1.13, 95% CI [1.08,1.18]) and mothers of other race/ethnicities (OR = 1.35, 95% CI [1.11,1.65]) compared to white mothers. CONCLUSION: Research and prevention programming must consider that the processes and pathways linking paternity establishment and maltreatment may differ within and between racial/ethnic groups.

The association between newborn screening analytes and childhood autism in a Texas Medicaid population, 2010-2012.

Autism (or autism spectrum disorder [ASD]) is an often disabling childhood neurologic condition of mostly unknown cause. It is commonly diagnosed at 3 or 4 years of age. We explored whether there was an association of any analytes measured by newborn screening tests with a later diagnosis of ASD. A database was compiled of 3-5 year-old patients with any ASD diagnosis in the Texas Medicaid system in 2010-2012. Two controls (without any ASD diagnosis) were matched to each case by infant sex and birth year/month. All study subjects were linked to their 2007-2009 birth and newborn screening laboratory records, including values for 36 analytes or analyte ratios. We examined the association of analytes/ratios with a later diagnosis of ASD. Among 3,258 cases and 6,838 controls, seven analytes (e.g., 17-hydroxyprogesterone, acylcarnitines) were associated with a later ASD diagnosis. In this exploratory study, an ASD diagnosis was associated with 7 of 36 newborn screening analytes/ratios. These findings should be replicated in other population-based datasets.

Maternal risk factor index and cesarean delivery among women with nulliparous, term, singleton, vertex deliveries, Texas, 2015.

BACKGROUND: Cesarean delivery accounts for over one-third of the ~400 000 annual births in Texas, with first-time cesarean accounting for 20% of the overall cesareans. We examined associations of maternal medical comorbidities with cesarean delivery among nulliparous, term, singleton, vertex (NTSV) deliveries in Texas. METHODS: Nulliparous, term, singleton, vertex deliveries to women aged 15-49 years were identified using the 2015 Texas birth file (Center for Health Statistics, Texas Department of State Health Services). A risk factor index was constructed (score range 0-4), including preexisting/gestational diabetes mellitus, preexisting/gestational hypertension/eclampsia, infertility treatment, smoking during pregnancy, and prepregnancy overweight/obesity, and categorized as 0, 1, 2, and 3+ based on the number of risk factors present. Multivariable logistic regression analyses were conducted to examine associations between the categorized risk factor index and cesarean delivery, overall and by maternal race and ethnicity. RESULTS: Among the 114 535 NTSV deliveries in Texas in 2015, 27.2% were by cesarean. The most prevalent maternal risk among all deliveries was prepregnancy overweight/obesity (42.4%). The odds of cesarean delivery increased significantly with increasing number of risk factors [one risk factor: 1.72 (95% CI 1.67-1.78); two risk factors: 2.58 (95% CI 2.46-2.71); and three or more risk factors: 3.91 (95% CI 3.45-4.44)]. DISCUSSION: In Texas in 2015, nearly half of NTSV deliveries had at least one maternal risk factor and the odds of cesarean delivery were significantly elevated for women with a higher risk index score. The findings from this study highlight the need for intervening during the preconception and interconception period as intrapartum care practices have an important influence on birth outcomes.

Parental negative emotions are related to behavioral and pupillary correlates of infants' attention to facial expressions of emotion.

Previous evidence revealed links between maternal negative emotions and infants' attention to facial expressions of emotion in clinical and community samples. This study investigated the associations between infants' attention to emotional faces and infants' and parents' negative emotions in a community sample. Infants' (N = 57, Mage = 14.26 months) fixations and pupil responses to fearful, sad, angry versus happy and neutral faces were measured with an eye-tracker. Mothers' and fathers' negative emotions (negative affect, depression, and anxiety), and infants' negative temperament were measured with questionnaires. Infants looked longer at fearful than happy or neutral faces, while they showed less pupil dilation to fearful than to happy or neutral faces. Higher levels of maternal negative emotions were related to less pupillary arousal to emotional facial expressions in infants, while paternal negative emotions did not predict infants' pupil responses. Exploratory analyses suggested a significant link between paternal but not maternal negative emotions and infants' fixations that was moderated by infant negative temperament: Higher levels of negative emotions in fathers were related to longer fixations in children with high levels of negative temperament, while it was related to shorter fixations in infants with low levels of negative temperament. The findings provide support for the idea that exposure to mothers' and fathers' negative emotions play a role on the development of infants' attention to facial expressions in typical development.

Infants' Temperament and Mothers', and Fathers' Depression Predict Infants' Attention to Objects Paired with Emotional Faces.

Between 10 and 14 months, infants gain the ability to learn about unfamiliar stimuli by observing others' emotional reactions to those stimuli, so called social referencing (SR). Joint processing of emotion and head/gaze direction is essential for SR. This study tested emotion and head/gaze direction effects on infants' attention via pupillometry in the period following the emergence of SR. Pupil responses of 14-to-17-month-old infants (N = 57) were measured during computerized presentations of unfamiliar objects alone, before-and-after being paired with emotional (happy, sad, fearful vs. neutral) faces gazing towards (vs. away) from objects. Additionally, the associations of infants' temperament, and parents' negative affect/depression/anxiety with infants' pupil responses were explored. Both mothers and fathers of participating infants completed questionnaires about their negative affect, depression and anxiety symptoms and their infants' negative temperament. Infants allocated more attention (larger pupils) to negative vs. neutral faces when the faces were presented alone, while they allocated less attention to objects paired with emotional vs. neutral faces independent of head/gaze direction. Sad (but not fearful) temperament predicted more attention to emotional faces. Infants' sad temperament moderated the associations of mothers' depression (but not anxiety) with infants' attention to objects. Maternal depression predicted more attention to objects paired with emotional expressions in infants low in sad temperament, while it predicted less attention in infants high in sad temperament. Fathers' depression (but not anxiety) predicted more attention to objects paired with emotional expressions independent of infants' temperament. We conclude that infants' own temperamental dispositions for sadness, and their exposure to mothers' and fathers' depressed moods may influence infants' attention to emotion-object associations in social learning contexts.

Measuring the bias, precision, accuracy, and validity of self-reported height and weight in assessing overweight and obesity status among adolescents using a surveillance system.

BACKGROUND: Evidence regarding bias, precision, and accuracy in adolescent self-reported height and weight across demographic subpopulations is lacking. The bias, precision, and accuracy of adolescent self-reported height and weight across subpopulations were examined using a large, diverse and representative sample of adolescents. A second objective was to develop correction equations for self-reported height and weight to provide more accurate estimates of body mass index (BMI) and weight status. METHODS: A total of 24,221 students from 8th and 11th grade in Texas participated in the School Physical Activity and Nutrition (SPAN) surveillance system in years 2000-2002 and 2004-2005. To assess bias, the differences between the self-reported and objective measures, for height and weight were estimated. To assess precision and accuracy, the Lin's concordance correlation coefficient was used. BMI was estimated for self-reported and objective measures. The prevalence of students' weight status was estimated using self-reported and objective measures; absolute (bias) and relative error (relative bias) were assessed subsequently. Correction equations for sex and race/ethnicity subpopulations were developed to estimate objective measures of height, weight and BMI from self-reported measures using weighted linear regression. Sensitivity, specificity and positive predictive values of weight status classification using self-reported measures and correction equations are assessed by sex and grade. RESULTS: Students in 8th- and 11th-grade overestimated their height from 0.68cm (White girls) to 2.02 cm (African-American boys), and underestimated their weight from 0.4 kg (Hispanic girls) to 0.98 kg (African-American girls). The differences in self-reported versus objectively-measured height and weight resulted in underestimation of BMI ranging from -0.23 kg/m2 (White boys) to -0.7 kg/m2 (African-American girls). The sensitivity of self-reported measures to classify weight status as obese was 70.8% and 81.9% for 8th- and 11th-graders, respectively. These estimates increased when using the correction equations to 77.4% and 84.4% for 8th- and 11th-graders, respectively. CONCLUSIONS: When direct measurement is not practical, self-reported measurements provide a reliable proxy measure across grade, sex and race/ethnicity subpopulations of adolescents. Correction equations increase the sensitivity of self-report measures to identify prevalence of overall overweight/obesity status.

Learning Stimulus-Location Associations in 8- and 11-Month-Old Infants: Multimodal versus Unimodal Information.

Research on the influence of multimodal information on infants' learning is inconclusive. While one line of research finds that multimodal input has a negative effect on learning, another finds positive effects. The present study aims to shed some new light on this discussion by studying the influence of multimodal information and accompanying stimulus complexity on the learning process. We assessed the influence of multimodal input on the trial-by-trial learning of 8- and 11-month-old infants. Using an anticipatory eye movement paradigm, we measured how infants learn to anticipate the correct stimulus-location associations when exposed to visual-only, auditory-only (unimodal), or auditory and visual (multimodal) information. Our results show that infants in both the multimodal and visual-only conditions learned the stimulus-location associations. Although infants in the visual-only condition appeared to learn in fewer trials, infants in the multimodal condition showed better anticipating behavior: as a group, they had a higher chance of anticipating correctly on more consecutive trials than infants in the visual-only condition. These findings suggest that effects of multimodal information on infant learning operate chiefly through effects on infants' attention.

Using a single feature to discriminate and form categories: the interaction between color, form and exemplar number.

There is relatively little work that has focused on how infants use a single feature to discriminate objects or flexibly group objects together. Existing research suggests that the ease with which infants learn form and color discriminations is not equal. However, which of these dimensions is easier when discriminating between objects is still unclear. The studies in this paper tested how infants used these two dimensions under varying levels of diversity in a discrimination task. Combining traditional analyses with latent-states Markov-modeling, infant learning in these studies was characterized by a bend of overt behavior and attentional processes. Infants were able to learn both a color and form-based discrimination, but only generalized the form distinction to new stimuli. When presented with diversity on the irrelevant dimension, infants in the form condition learned quickly. However, infants in the color-condition did not show signs that they learned the distinction. The results show that infants could use both dimensions to distinguish between objects, but that form-based distinctions were easier and more likely to be generalized to new objects.

The dynamics of development on the Dimensional Change Card Sorting task.

A widely used paradigm to study cognitive flexibility in preschoolers is the Dimensional Change Card Sorting (DCCS) task. The developmental dynamics of DCCS performance was studied in a cross-sectional design (N = 93, 3 to 5 years of age) using a computerized version of the standard DCCS task. A model-based analysis of the data showed that development on the DCCS task is best described as a discontinuous change in performance on the post-switch phase of the task. In addition to a perseveration group and a switch group, a transitional group that showed shifts between perseverating and switching during the post-switch trials could be distinguished. Computational models of performance and development on the DCCS task cannot, in their current forms, explain these results. We discuss how a catastrophe model of the developmental changes in task performance could be used to generate specific hypotheses about the variables that control development of DCCS performance.