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1.
BMC Psychol ; 12(1): 111, 2024 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-38429801

RESUMO

BACKGROUND: Experiential avoidance (EA) is a psychological mechanism associated with several mental health disorders and is regarded as a relevant target by third-generation cognitive behavioral therapies. It has been mainly assessed through self-report questionnaires, and the AAQ-II is the most used tool. Its psychometric evidence has been mostly tested through the classical test theory (CTT) and very scarcely assessed through Item Response Theory (IRT). METHODS: We used the Graded Response Model to examine its psychometric properties in Spanish-speaking university students (n = 1503; women = 995 (66.2%), mean age = 19.29, SD = 2.45). We tested whether the empirical data fit the model's predictions and estimated the dispersion of persons and items along the experiential avoidance continuum. Moreover, we examined category probability curves to identify the response probability of each answer. Likewise, an item-person map was made where the measurement of persons and items, both on the same scale and along the experiential avoidance continuum, could be observed jointly. Finally, we tested the gender invariance of the scale. RESULTS: We found that the values of the individuals and the items were in the established range to be considered an adequate measure of EA. Additionally, we observed high discrimination indices for all items. The current version with seven answer options could not be optimal and should be tested in future studies. Finally, we found evidence of differential functioning by gender in one of the seven items of the instrument. CONCLUSIONS: Our results indicate that the AAQ-II is a suitable tool for measuring EA and accurately classifying and differentiating EA levels in university students.


Assuntos
Estudantes , Humanos , Feminino , Adulto Jovem , Adulto , Psicometria , Chile , Universidades , Inquéritos e Questionários
2.
J Atten Disord ; 28(4): 512-530, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38180045

RESUMO

OBJECTIVE: We analyzed adult ADHD symptoms in a cross-cultural context, including investigating the occurrence and potential correlates of adult ADHD and psychometric examination of the Adult ADHD Self-Report Scale (ASRS) Screener. METHOD: Our analysis is based on a large-scale research project involving 42 countries (International Sex Survey, N=72,627, 57% women, Mage=32.84; SDage=12.57). RESULTS: The ASRS Screener demonstrated good reliability and validity, along with partial invariance across different languages, countries, and genders. The occurrence of being at risk for adult ADHD was relatively high (21.4% for women, 18.1% for men). The highest scores were obtained in the US, Canada, and other English-speaking Western countries, with significantly lower scores among East Asian and non-English-speaking European countries. Moreover, ADHD symptom severity and occurrence were especially high among gender-diverse individuals. Significant associations between adult ADHD symptoms and age, mental and sexual health, and socioeconomic status were observed. CONCLUSIONS: Present results show significant cross-cultural variability in adult ADHD occurrence as well as highlight important factors related to adult ADHD. Moreover, the importance of further research on adult ADHD in previously understudied populations (non-Western countries) and minority groups (gender-diverse individuals) is stressed. Lastly, the present analysis is consistent with previous evidence showing low specificity of adult ADHD screening instruments and contributes to the current discussion on accurate adult ADHD screening and diagnosis.


Assuntos
Transtorno do Deficit de Atenção com Hiperatividade , Adulto , Humanos , Masculino , Feminino , Autorrelato , Transtorno do Deficit de Atenção com Hiperatividade/diagnóstico , Transtorno do Deficit de Atenção com Hiperatividade/epidemiologia , Reprodutibilidade dos Testes , Comparação Transcultural , Inquéritos e Questionários
3.
J Affect Disord ; 350: 991-1006, 2024 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-38244805

RESUMO

BACKGROUND: Depression and anxiety are among the most prevalent mental health issues experienced worldwide. However, whereas cross-cultural studies utilize psychometrically valid and reliable scales, fewer can meaningfully compare these conditions across different groups. To address this gap, the current study aimed to psychometrically assess the Brief Symptomatology Index (BSI) in 42 countries. METHODS: Using data from the International Sex Survey (N = 82,243; Mage = 32.39; SDage = 12.52; women: n = 46,874; 57 %), we examined the reliability of depression and anxiety symptom scores of the BSI-18, as well as evaluated evidence of construct, invariance, and criterion-related validity in predicting clinically relevant variables across countries, languages, genders, and sexual orientations. RESULTS: Results corroborated an invariant, two-factor structure across all groups tested, exhibiting excellent reliability estimates for both subscales. The 'caseness' criterion effectively discriminated among those at low and high risk of depression and anxiety, yielding differential effects on the clinical criteria examined. LIMITATIONS: The predictive validation was not made against a clinical diagnosis, and the full BSI-18 scale was not examined (excluding the somatization sub-dimension), limiting the validation scope of the BSI-18. Finally, the study was conducted online, mainly by advertisements through social media, ultimately skewing our sample towards women, younger, and highly educated populations. CONCLUSIONS: The results support that the BSI-12 is a valid and reliable assessment tool for assessing depression and anxiety symptoms across countries, languages, genders, and sexual orientations. Further, its caseness criterion can discriminate well between participants at high and low risk of depression and anxiety.


Assuntos
Comparação Transcultural , Depressão , Humanos , Feminino , Masculino , Adulto , Criança , Depressão/diagnóstico , Reprodutibilidade dos Testes , Psicometria , Ansiedade/diagnóstico , Inquéritos e Questionários
4.
Behav Res Methods ; 2023 Dec 21.
Artigo em Inglês | MEDLINE | ID: mdl-38129734

RESUMO

It is common for some participants in self-report surveys to be careless, inattentive, or lacking in effort. Data quality can be severely compromised by responses that are not based on item content (non-content-based [nCB] responses), leading to strong biases in the results of data analysis and misinterpretation of individual scores. In this study, we propose a specification of factor mixture analysis (FMA) to detect nCB responses. We investigated the usefulness and effectiveness of the FMA model in detecting nCB responses using both simulated data (Study 1) and real data (Study 2). In the first study, FMA showed reasonably robust sensitivity (.60 to .86) and excellent specificity (.96 to .99) on mixed-worded scales, suggesting that FMA had superior properties as a screening tool under different sample conditions. However, FMA performance was poor on scales composed of only positive items because of the difficulty in distinguishing acquiescent patterns from valid responses representing high levels of the trait. In Study 2 (real data), FMA detected a minority of cases (6.5%) with highly anomalous response patterns. Removing these cases resulted in a large increase in the fit of the unidimensional model and a substantial reduction in spurious multidimensionality.

5.
Compr Psychiatry ; 127: 152427, 2023 11.
Artigo em Inglês | MEDLINE | ID: mdl-37782987

RESUMO

INTRODUCTION: Despite being a widely used screening questionnaire, there is no consensus on the most appropriate measurement model for the Alcohol Use Disorders Identification Test (AUDIT). Furthermore, there have been limited studies on its measurement invariance across cross-cultural subgroups, genders, and sexual orientations. AIMS: The present study aimed to examine the fit of different measurement models for the AUDIT and its measurement invariance across a wide range of subgroups by country, language, gender, and sexual orientation. METHODS: Responses concerning past-year alcohol use from the participants of the cross-sectional International Sex Survey were considered (N = 62,943; Mage: 32.73; SD = 12.59). Confirmatory factor analysis, as well as measurement invariance tests were performed for 21 countries, 14 languages, three genders, and four sexual-orientation subgroups that met the minimum sample size requirement for inclusion in these analyses. RESULTS: A two-factor model with factors describing 'alcohol use' (items 1-3) and 'alcohol problems' (items 4-10) showed the best model fit across countries, languages, genders, and sexual orientations. For the former two, scalar and latent mean levels of invariance were reached considering different criteria. For gender and sexual orientation, a latent mean level of invariance was reached. CONCLUSIONS: In line with the two-factor model, the calculation of separate alcohol-use and alcohol-problem scores is recommended when using the AUDIT. The high levels of measurement invariance achieved for the AUDIT support its use in cross-cultural research, capable also of meaningful comparisons among genders and sexual orientations.


Assuntos
Alcoolismo , Humanos , Masculino , Feminino , Alcoolismo/diagnóstico , Alcoolismo/epidemiologia , Comparação Transcultural , Psicometria , Estudos Transversais , Comportamento Sexual , Inquéritos e Questionários , Análise Fatorial , Reprodutibilidade dos Testes
6.
J Psychiatr Res ; 165: 16-27, 2023 09.
Artigo em Inglês | MEDLINE | ID: mdl-37453212

RESUMO

The Alcohol, Smoking and Substance Involvement Screening Test (ASSIST) is an instrument to screen substance-use-related health risks. However, little is known whether the ASSIST could be further shortened while remaining psychometrically sound across different countries, languages, gender identities, and sexual-orientation-based groups. The study aimed to validate a shortened 11-item ASSIST (ASSIST-11). Using the International Sex Survey data, 82,243 participants (M age = 32.39 years) across 42 countries and 26 languages completed questions from the ASSIST-11 regarding gender identity, sexual orientation, and other information. Confirmatory factor analysis (CFA) and multigroup CFA (MGCFA) evaluated the ASSIST-11's structure and tested measurement invariance across groups. Cronbach's α and McDonald's ω were used to examine the internal consistency. Cohen's d and independent t-tests were used to examine known-group validity. The ASSIST-11 was unidimensional across countries, languages, age groups, gender identities (i.e., men, women, and gender-diverse individuals), and sexual orientations (i.e., heterosexual and sexual minority individuals). Cronbach's α was 0.63 and McDonald's ω was 0.68 for the ASSIST-11. Known-group validity was supported by Cohen's d (range between 0.23 and 0.40) with significant differences (p-values<0.001). The ASSIST-11 is a modified instrument with a unidimensional factor structure across different languages, age groups, countries, gender identities, and sexual orientations. The low internal consistency of the ASSIST-11 might be acceptable as it assesses a broad concept (i.e., use of several different substances). Healthcare providers and researchers may use the ASSIST-11 to quickly assess substance-use information from general populations and evaluate the need to follow up with more detailed questions about substance use.


Assuntos
Comparação Transcultural , Transtornos Relacionados ao Uso de Substâncias , Humanos , Masculino , Feminino , Adulto , Psicometria , Identidade de Gênero , Inquéritos e Questionários , Fumar , Transtornos Relacionados ao Uso de Substâncias/diagnóstico , Reprodutibilidade dos Testes
7.
J Pers Soc Psychol ; 125(6): 1472-1494, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37384461

RESUMO

This article explores the analysis and interpretation of wording effects associated with using direct and reverse items in psychological assessment. Previous research using bifactor models has suggested a substantive nature of this effect. The present study uses mixture modeling to systematically examine an alternative hypothesis and surpass recognized limitations in the bifactor modeling approach. In preliminary supplemental Studies S1 and S2, we examined the presence of participants who exhibited wording effects and evaluated their impact on the dimensionality of Rosenberg's Self-Esteem and the Revised Life Orientation Test, confirming the ubiquity of wording effects in scales containing direct and reverse items. Then, after analyzing the data for both scales (n = 5,953), we found that, despite a significant association between wording factors (Study 1), a low proportion of participants simultaneously exhibited asymmetric responses in both scales (Study 2). Similarly, despite finding both longitudinal invariance and temporal stability of this effect in three waves (n = 3,712, Study 3), a small proportion of participants was identified with asymmetric responses over time (Study 4), reflected in lower transition parameters compared to the other patterns of profiles examined. In both cases, we illustrate how bifactor models capitalize on the responses of individuals who do not even exhibit wording effects, yielding spurious correlations suggesting a substantive nature of the wording effect. These findings support the notion of an ephemeral nature underlying wording effects. The discussion focuses on alternative hypotheses to understand these findings and emphasizes the utility of including reverse items in psychological assessment. (PsycInfo Database Record (c) 2023 APA, all rights reserved).


Assuntos
Autoimagem , Humanos , Análise Fatorial , Psicometria
8.
Multivariate Behav Res ; 57(5): 718-734, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-34048313

RESUMO

This article examines wording effects when positive and negative worded items are included in psychological assessment. Wordings effects have been analyzed in the literature using statistical approaches based on population homogeneity assumptions (i.e. CFA, SEM), commonly adopting the bifactor model to separate trait variance and wording effects. This article presents an alternative approach by explicitly modeling population heterogeneity through a latent profile model, based on the idea that a subset of individuals exhibits wording effects. This kind of mixture model allows simultaneously to classify respondents, substantively characterize the differences in their response profiles, and report respondents' results in a comparable manner. Using the Rosenberg's self-esteem scale data from the LISS Panel (N = 6,762) in three studies, we identify a subgroup of participants who respond differentially according to item-wording and examine the impact of its responses in the estimation of the RSES measurement model, in terms of global and individual fit, under one-factor and bifactor models.The results of these analyses support the interpretation of wording effects in terms of a theoretically-proposed differential pattern of response to positively and negatively worded items, introducing a valuable tool for examining the artifactual or substantive interpretations of such wording effects.


Assuntos
Autoimagem , Análise Fatorial , Humanos , Psicometria , Inquéritos e Questionários
9.
PeerJ ; 8: e10209, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33240604

RESUMO

BACKGROUND: In three recent studies, Maul demonstrated that sets of nonsense items can acquire excellent psychometric properties. Our aim was to find out why responses to nonsense items acquire a well-defined structure and high internal consistency. METHOD: We designed two studies. In the first study, 610 participants responded to eight items where the central term (intelligence) was replaced by the term "gavagai". In the second study, 548 participants responded to seven items whose content was totally invented. We asked the participants if they gave any meaning to "gavagai", and conducted analyses aimed at uncovering the most suitable structure for modeling responses to meaningless items. RESULTS: In the first study, 81.3% of the sample gave "gavagai" meaning, while 18.7% showed they had given it no interpretation. The factorial structures of the two groups were very different from each other. In the second study, the factorial model fitted almost perfectly. However, further analysis revealed that the structure of the data was not continuous but categorical with three unordered classes very similar to midpoint, disacquiescent, and random response styles. DISCUSSION: Apparently good psychometric properties on meaningless scales may be due to (a) respondents actually giving an interpretation to the item and responding according to that interpretation, or (b) a false positive because the statistical fit of the factorial model is not sensitive to cases where the actual structure of the data does not come from a common factor. In conclusion, the problem is not in factor analysis, but in the ability of the researcher to elaborate substantive hypotheses about the structure of the data, to employ analytical procedures congruent with those hypotheses, and to understand that a good fit in factor analysis does not have a univocal interpretation and is not sufficient evidence of either validity nor good psychometric properties.

10.
J Exp Psychol Anim Learn Cogn ; 46(3): 205-214, 2020 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-32730079

RESUMO

One of the most persisting assertions in Allan Wagner's view of conditioning is that the environment or context in which significant events occur can develop an association with these events, more or less in the same way as conditioned and unconditioned stimuli become associated with each other. He was drawn to this idea by evidence of contextual fear conditioning, contingency effects, some instances of context-specificity of long-term habituation, and latent inhibition. From a theoretical point of view, however, homologizing contexts to conditioned stimuli is not as simple as it seems, especially when quantitative theories are involved, as is the case of Wagner's work. It might be, for instance, that contexts cannot be represented merely as long-duration conditioned stimuli, in which case, no net contextual learning can occur due to the context being less correlated with reinforcement than with nonreinforcement. In this article, we use Wagner's sometimes-opponent-process model of conditioning to comment on the quantitative nature of this challenge. Also, based on an idea sketched by Mazur and Wagner, we describe a set of quantitative strategies that might be usefully considered to solve this dilemma within the general framework of Wagner's theory. (PsycInfo Database Record (c) 2020 APA, all rights reserved).


Assuntos
Aprendizagem por Associação/fisiologia , Condicionamento Clássico/fisiologia , Modelos Psicológicos , Teoria Psicológica , Animais
11.
Front Psychol ; 10: 504, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30930815

RESUMO

Habituation is defined as a decline in responding to a repeated stimulus. After more than 80 years of research, there is an enduring consensus among researchers on the existence of 9-10 behavioral regularities or parameters of habituation. There is no similar agreement, however, on the best approach to explain these facts. In this paper, we demonstrate that the Sometimes Opponent Processes (SOP) model of stimulus processing accurately describes all of these regularities. This model was proposed by Allan Wagner as a quantitative elaboration of priming theory, which states that the processing of a stimulus, and therefore its capacity to provoke its response, depends inversely on the degree to which the stimulus is pre-represented in short-term memory. Using computer simulations, we show that all the facts involving within-session effects or short-term habituation might be the result of priming from recent presentations of the stimulus (self-generated priming). The characteristics involving between-sessions effects or long-term habituation would result from the retrieval of the representation of the stimulus from memory by the associated context (associatively generated priming).

12.
Q J Exp Psychol (Hove) ; 72(2): 346-374, 2019 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-29741452

RESUMO

The Sometimes Opponent Processes (SOP) model in its original form was especially calculated to address how expected unconditioned stimulus (US) and conditioned stimulus (CS) are rendered less effective than their novel counterparts in Pavlovian conditioning. Its several elaborations embracing the essential notion have extended the scope of the model to integrate a much greater number of phenomena of Pavlovian conditioning. Here, we trace the development of the model and add further thoughts about its extension and refinement.


Assuntos
Aprendizagem por Associação/fisiologia , Condicionamento Clássico/fisiologia , Modelos Psicológicos , Humanos
13.
Assessment ; 25(7): 885-897, 2018 10.
Artigo em Inglês | MEDLINE | ID: mdl-27872349

RESUMO

BACKGROUND: In the past decade, the bifactor model of attention-deficit/hyperactivity disorder (ADHD) has been extensively researched. This model consists of an ADHD general dimension and two specific factors: inattention and hyperactivity/impulsivity. All studies conclude that the bifactor is superior to the traditional two-correlated factors model, according to the fit obtained by factor analysis. However, the proper interpretation of a bifactor not only depends on the fit but also on the quality of the measurement model. OBJECTIVE: To evaluate the model-based reliability, distribution of common variance and construct replicability of general and specific ADHD factors. METHOD: We estimated expected common variance, omega hierarchical/subscale and H-index from standardized factor loadings of 31 ADHD bifactor models previously published. RESULTS AND CONCLUSION: The ADHD general factor explained most of the common variance. Given the low reliable variance ratios, the specific factors were difficult to interpret. However, in clinical samples, inattention acquired sufficient specificity and stability for interpretation beyond the general factor. Implications for research and clinical practice are discussed.


Assuntos
Transtorno do Deficit de Atenção com Hiperatividade/psicologia , Modelos Psicológicos , Análise Fatorial , Humanos , Psicometria , Reprodutibilidade dos Testes
14.
Behav Processes ; 137: 19-32, 2017 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-27346424

RESUMO

The available data on occasion setting led Susan Brandon and Allan Wagner (Brandon and Wagner, 1998; Wagner and Brandon, 2001) to formulate what has come to be known as a replaced-elements conception (REM) of context-dependent cues within the SOP model (Wagner, 1981). In the present paper, we review the development of the theory, and show how, with a few congenial assumptions about shared cues, it can address some of the major regularities concerning when the transfer of occasion setting does or does not occur. Among the particular examples are the relatively unique transfers that have been reported to occur between separate serial discriminations and between targets that have been trained with the same versus different reinforcers.


Assuntos
Aprendizagem por Associação , Condicionamento Clássico , Condicionamento Operante , Sinais (Psicologia) , Aprendizagem por Discriminação , Transferência de Experiência , Animais , Simulação por Computador , Modelos Psicológicos , Ratos , Reforço Psicológico
15.
PLoS One ; 11(10): e0164474, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27736911

RESUMO

The Diagnostic and Statistical Manual of Mental Disorders (DSM) diagnostic criteria assume that the 18 symptoms carry the same weight in an Attention Deficit with Hyperactivity Disorder (ADHD) diagnosis and bear the same discriminatory capacity. However, it is reasonable to think that symptoms may differ in terms of severity and even in the reliability with they represent the disorder. To test this hypothesis, the aim of this study was to calibrate in a sample of Spanish children (age 4-7; n = 784) a scale for assessing the symptoms of ADHD proposed by Diagnostic and Statistical Manual of Mental Disorders, IV-TR within the framework of Item Response Theory. Samejima's Graded Response Model was used as a method for estimating the item difficulty and discrimination parameters. The results showed that ADHD subscales (Attention Deficit and Hyperactivity / Impulsivity) had good psychometric properties and had also a good fit to the model. However, relevant differences between symptoms were observed at the level of severity, informativeness and reliability for the assessment of ADHD. This finding suggests that it would be useful to identify the symptoms that are more important than the others with regard to diagnosing ADHD.


Assuntos
Transtorno do Deficit de Atenção com Hiperatividade/diagnóstico , Modelos Teóricos , Criança , Pré-Escolar , Manual Diagnóstico e Estatístico de Transtornos Mentais , Feminino , Humanos , Masculino , Análise de Componente Principal , Psicometria , Espanha
16.
J Abnorm Psychol ; 125(1): 125-137, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-26726819

RESUMO

We tested first-order factor and bifactor models of attention-deficit/hyperactivity disorder (ADHD) using confirmatory factor analysis (CFA) and exploratory structural equation modeling (ESEM) to adequately summarize the Diagnostic and Statistical Manual of Mental Disorders, 4th Edition, (DSM-IV-TR) symptoms observed in a Spanish sample of preschoolers and kindergarteners. Six ESEM and CFA models were estimated based on teacher evaluations of the behavior of 638 children 4 to 6 years of age. An ESEM bifactor model with a central dimension plus 3 specific factors (inattention, hyperactivity, and impulsivity) showed the best fit and interpretability. Strict invariance between the sexes was observed. The bifactor model provided a solution to previously encountered inconsistencies in the factorial models of ADHD in young children. However, the low reliability of the specific factors casts doubt on the utility of the subscales for ADHD measurement. More research is necessary to clarify the nature of G and S factors of ADHD.


Assuntos
Transtorno do Deficit de Atenção com Hiperatividade/diagnóstico , Atenção/fisiologia , Hipercinese/psicologia , Comportamento Impulsivo/fisiologia , Modelos Psicológicos , Transtorno do Deficit de Atenção com Hiperatividade/psicologia , Criança , Pré-Escolar , Análise Fatorial , Feminino , Humanos , Masculino , Psicometria , Reprodutibilidade dos Testes , Avaliação de Sintomas/métodos
17.
Health Qual Life Outcomes ; 13: 154, 2015 Sep 23.
Artigo em Inglês | MEDLINE | ID: mdl-26395870

RESUMO

BACKGROUND: The Connor-Davidson Resilience Scale (CD-RISC) is inarguably one of the best-known instruments in the field of resilience assessment. However, the criteria for the psychometric quality of the instrument were based only on classical test theory. METHOD: The aim of this paper has focused on the calibration of the CD-RISC with a nonclinical sample of 444 adults using the Rasch-Andrich Rating Scale Model, in order to clarify its structure and analyze its psychometric properties at the level of item. RESULTS: Two items showed misfit to the model and were eliminated. The remaining 22 items form basically a unidimensional scale. The CD-RISC has good psychometric properties. The fit of both the items and the persons to the Rasch model was good, and the response categories were functioning properly. Two of the items showed differential item functioning. CONCLUSIONS: The CD-RISC has an obvious ceiling effect, which suggests to include more difficult items in future versions of the scale.


Assuntos
Qualidade de Vida/psicologia , Resiliência Psicológica , Inquéritos e Questionários/normas , Adulto , Calibragem , Análise Fatorial , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Psicometria/instrumentação , Transtornos de Estresse Pós-Traumáticos/diagnóstico
18.
Cognition ; 143: 163-77, 2015 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-26163820

RESUMO

Compound generalization and dimensional generalization are traditionally studied independently by different groups of researchers, who have proposed separate theories to explain results from each area. A recent extension of Shepard's rational theory of dimensional generalization allows an explanation of data from both areas within a single framework. However, the conceptualization of dimensional integrality in this theory (the direction hypothesis) is different from that favored by Shepard in his original theory (the correlation hypothesis). Here, we report two experiments that test differential predictions of these two notions of integrality. Each experiment takes a design from compound generalization and translates it into a design for dimensional generalization by replacing discrete stimulus components with dimensional values. Experiment 1 showed that an effect analogous to summation is found in dimensional generalization with separable dimensions, but the opposite effect is found with integral dimensions. Experiment 2 showed that the analogue of a biconditional discrimination is solved faster when stimuli vary in integral dimensions than when stimuli vary in separable dimensions. These results, which are analogous to more "non-linear" processing with integral than with separable dimensions, were predicted by the direction hypothesis, but not by the correlation hypothesis. This confirms the assumptions of the unified rational theory of stimulus generalization and reveals interesting links between compound and dimensional generalization phenomena.


Assuntos
Formação de Conceito/fisiologia , Generalização Psicológica/fisiologia , Aprendizagem/fisiologia , Modelos Psicológicos , Adolescente , Causalidade , Feminino , Humanos , Masculino , Adulto Jovem
19.
Univ. psychol ; 13(4): 1245-1254, oct.-dic. 2014. ilus
Artigo em Espanhol | LILACS | ID: lil-751229

RESUMO

Wagner (1978) propuso que la habituación, definida como una disminución en la respuesta a un estímulo que se repite, dependería de la formación de una asociación entre el contexto y el estímulo. Según este enfoque, la habituación debería ser contexto-específica, es decir, la respuesta habituada en un contexto debería deshabituarse al presentar el estímulo en un contexto novedoso. Esta hipótesis fue examinada a través de un experimento donde se sometió a un grupo de estudiantes a una sesión de habituación consistente en 60 repeticiones de un estímulo provocador de reacciones de parpadeo y aceleración cardiaca. Posteriormente, en una sesión de prueba se midió la amplitud de estas respuestas, presentando el estímulo en el mismo contexto (Grupo Igual) o en un contexto distinto a aquel donde ocurrió la habituación (Grupo Diferente). Los resultados de la prueba arrojaron evidencia de especificidad contextual diferencial para ambas respuestas, ya que la respuesta de aceleración cardiaca resultó disminuida en el grupo igual pero no en el grupo diferente (revelando especificidad), mientras que la respuesta de parpadeo estuvo igualmente disminuida en ambos grupos (revelando ausencia de especificidad). Estos hallazgos confirman observaciones previas con ratas que demuestran que el control contextual de la habituación depende de la naturaleza de la respuesta.


Wagner (1978) proposed that habituation, defined as a decrease in responding to a repeated stimulus, would depend on the formation of an association between the stimulus and the context. According to this approach, habitua-tion should be context-specific; that is, a response that was habituated in a given context should dishabituate when the stimulus is presented in a novel context. This hypothesis was examined in an experiment in which a group of students received a habituation session consisting of 60 repetitions of a stimulus capable of evoking eyeblink and heart-rate acceleration reactions. Subsequently, in a testing session the amplitude of these responses was examined by presenting the stimulus in the same context used in the habituation session (Group Same) or in an alternative context (Group Different). The results provided evidence of differential context-specificity for the two responses, since the heart-rate acceleration response was diminished in the group same but not in the group different (revealing specificity), while the eyeblink response was diminished in both groups (revealing no specificity). These findings are consistent with previous observations in rats demonstrating that the contextual control of habituation depends on the nature of the measured response.


Assuntos
Psicologia , Aprendizagem
20.
Univ. psychol ; 13(spe5): 2059-2068, dic. 2014.
Artigo em Espanhol | LILACS | ID: lil-751290

RESUMO

Amanda Labarca fue una connotada educadora chilena que vivió entre los años 1886 y 1975, cuya contribución e influencia a la psicología ha sido recientemente reconocida en Chile. El presente trabajo se propone dar a conocer sus antecedentes biográficos y académicos, por medio de una revisión documental, para luego contextualizar el entramado sociopolítico de la época. Finalmente, se describen sus principales referencias psicológicas en el ámbito educativo. En su transitar, viajó constantemente a Estados Unidos empapándose del trabajo de William James y John Dewey, dos de sus principales maestros, a quienes admiró y dio a conocer sus teorías.


Amanda Labarca was a renowned teacher that was born in 1886 and died in 1975. She was the first female university teacher in Chile. Her contribution and influence in psychology have been recently recognised. The objective of the present work is to show her personal and academic history by means of an evidence review, to provide a context for the socio-political period. Finally, her main psychological references, regarding the educational area, are described. Due to her frequent visits to USA, she was steeped in William James and John Dewey's work, her main masters, to whom she admired and tried to spread their theories.


Assuntos
Psicologia/história , Ensino , Chile
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