Nonlinear age effects in tactile processing from early childhood to adulthood.

BACKGROUND: Tactile processing plays a pivotal role in the early stages of human development; however, little is known about tactile function in young children. An understanding of how tactile processing changes with age from early childhood to adulthood is fundamental in understanding altered tactile experiences in neurodevelopmental disorders, such as autism spectrum disorder. METHODS: In this cross-sectional study, 142 children and adults aged 3-23 years completed a vibrotactile testing battery consisting of 5 tasks, which rely on different cortical and cognitive mechanisms. The battery was designed to be suitable for testing in young children to investigate how tactile processing changes from early childhood to adulthood. RESULTS: Our results suggest a pattern of rapid, age-related changes in tactile processing toward lower discrimination thresholds (lower discrimination thresholds = greater sensitivity) across early childhood, though we acknowledge limitations with cross-sectional data. Differences in the rate of change across tasks were observed, with tactile performance reaching adult-like levels at a younger age on some tasks compared to others. CONCLUSIONS: While it is known that early childhood is a period of profound development including tactile processing, our data provides evidence for subtle differences in the developmental rate of the various underlying cortical, physical, and cognitive processes. Further, we are the first to show the feasibility of vibrotactile testing in early childhood (<6 years). The results of this work provide estimates of age-related differences in performance, which could have important implications as a reference for investigating altered tactile processing in developmental disorders.

Differences in Dental Students' Intercultural Competence Across a Four-Year Program.

Cultural competence is a combination of knowledge, awareness, and skills that dentists must acquire during their training in order to work with diverse populations. The aim of this study was to measure the perceived cultural competence of dental students in all four years at the University of Alberta in Canada. In 2018, a validated 17-item questionnaire-the Knowledge, Efficacy, and Practices Instrument for Oral Health Providers-was used to assess the students' perceived level of cultural competence on a scale from 1=lowest to 4=highest. Students were grouped into four cohorts (C1, C2, C3, C4) based on their level in the program. Newly admitted students (C1) were surveyed before they took any classes; first-year students were designated C2; second-year students were designated C3; and third- and fourth-year students were combined into C4. Of 160 students, 72% responded, and 102 eligible students (64%) were included in the analysis. The average age of participants was 24.6 years (SD=3.23), 56% were men, and 75% were born in Canada. White and East Asian were the most (48%) and second most (23%) prevalent race/ethnicity. The analysis showed a significant relationship between cohort groupings and determinant components for student classification. The overall mean scores by cohort were C1 2.50 (SD=0.81), C2 2.60 (SD=0.79), C3 2.81 (SD=0.69), and C4 3.04 (SD=0.80). The mean scores of C4 were significantly higher than the mean scores of the other cohorts (p=0.001). This study found that clinical-level students at the University of Alberta had significantly higher perceived cultural competence than those in the preclinical years, though the results also pointed to the need for increased training in this area.