Integration of Sequential Information for Shape Perception by Infants: A Developmental Study

Perception of form by spatiotemporal integration was investigated in 3 experiments. In the first, infants aged 8, 10, and 12 months were tested using a novelty-preference procedure to determine the earliest age at which recognition of rectilinear and curvilinear form occurred. Infants were shown a light-point tracing of the outline of a figure, followed by simultaneous presentation of 2 test objects, one of the same shape as the tracing and one of a different shape. The tracing was double the size of the test objects. Only infants in the oldest group responded selectively by looking longer at the object of different shape. In the second experiment with 12-month-old infants only, it was shown that recognition of rectilinear, but not curvilinear, form occurred despite a difference in the orientation and size of tracing and object. Computer-generated tracings were used in the final experiment to compare form recognition for 2D and 3D stimuli. Selective responding occurred only for the latter. These findings show that by 12 months infants perceive the correspondence between the figural properties of a tracing and its extended form, but that this perception is dependent on the provision of depth cues.     

Investigating the Interrelations Between Systems of Support in 13- to 18-Year-Old Adolescents: A Network Analysis of Resilience Promoting Systems in a High and Middle-Income Country

Adolescents’ ability to function well under adversity relies on a network of interrelated support systems. This study investigated how consecutive age groups differ in the interactions between their support systems. A secondary data analysis of cross-sectional studies that assessed individual, caregiver, and contextual resources using the Child and Youth Resilience Measure (Ungar & Liebenberg, 2005) in 13- to 18-year-olds in Canada (N = 2,311) and South Africa (N = 3,039) was conducted applying network analysis. Individual and contextual systems generally showed the highest interconnectivity. While the interconnectivity between the individual and caregiver system declined in the Canadian sample, a u-shaped pattern was found for South Africa. The findings give first insights into cross-cultural and context-dependent patterns of interconnectivity between fundamental resource systems during adolescence.     

Stimulus control of foodcup approach following fixed ratio reinforcement

Rats were trained on fixed ratio (FR) schedules requiring either 5 or 10 leverpresses to produce reinforcement and an intertrial interval (ITI). Half of the Ss at each ratio requirement were extinguished on an FR 5 and half on an FR 10 schedule of ITI presentation. Fewer foodcup approaches were made on the FR 10 than on the FR 5 extinction schedule, regardless of acquisition FR. Leverpresses per approach were fewer on the FR 5 than on the FR 10 extinction schedule and were fewer following FR 5 than following FR 10 acquisition. Data suggested the existence of interoceptive as well as exteroceptive stimulus control of foodcup approach and were discussed in terms of their implications for a response-unit account of extinction.     

Examining Trauma-Informed Teaching and the Trauma Symptomatology of Court-Involved Girls

Young women living in urban contexts, particularly those with involvement in the foster care and juvenile justice systems, experience significant barriers to academic well-being as a result of childhood trauma. To date, little research has been done to evaluate evidence-based, trauma-informed educational interventions to improve outcomes among these students. This study used survey data from a multi-year trauma-informed teaching intervention to quantitatively measure the well-being of trauma-exposed girls in an urban, trauma-informed school setting. The study explored whether girls at a trauma-informed school demonstrated significant changes in trauma symptomatology and whether these changes varied by race/ethnicity. As hypothesized, participants experienced a statistically significant decrease in trauma symptoms over the observation period. However, there were no significant differences in trauma symptom change based on race/ethnicity. Policy and practice implications are discussed.

     

Children’s acquisition and use of the control-of-variables strategy: effects of explicit and implicit instructional guidance

Direct instruction is a proven effective method to strengthen children’s ability to design unconfounded experiments using the control-of-variables strategy (CVS). Recent research suggests that task segmentation can also promote children’s use of this strategy. The present study investigated this assumption by comparing the relative effectiveness of both instructional approaches in elementary science classes. Children in the direct instruction condition (n = 22) were taught the CVS prior to investigating a multivariable inquiry task. Children in the task structuring condition (n = 23) were not, but received a segmented version of the inquiry task that addressed the variables in successive order. Children in the control condition (n = 22) investigated the multivariable inquiry task without additional support. Comparison among these three conditions revealed that task structuring equals direct instruction in effectiveness to promote children to use the CVS and draw valid inferences, and that either type of guidance is more effective than unguided inquiry learning. However, as children’s knowledge of the CVS improved as much in either condition, more practice seems needed for children to take full advantage of both instructional approaches.     

A review of the characteristics of intermediate assessment and their relationship with student grades

In-course assessment, such as midterms, quizzes or presentations, is often an integral part of higher education courses. These so-called intermediate assessments influence students’ final grades. The current review investigates which characteristics of intermediate assessment relate to these grades. In total, 88 articles were reviewed that examined the relationship between intermediate assessment and student grades. Four main characteristics were identified: the use of feedback, whether the assessment is mandatory, who is the assessor, and the reward students get for participating. Results indicate that corrective feedback leads to the most positive results, but elaborate feedback may benefit lower achieving groups. No difference in results was found for mandatory versus voluntary intermediate assessments. Peer assessment seemed to be beneficial, and rewarding students with course credit improves grades more than other rewards. Three scenarios are presented on how teachers can combine the different characteristics to optimise their intermediate assessment.