Context effects: the proportional difference model and the reflection of preference

The reflection effect (D. Kahneman & A. Tversky, 1979) was investigated using the stochastic model of choice developed by C. Gonzalez-Vallejo (2002). The model assumes that individuals make trade-offs among attribute values by relying on a difference variable. The model also specifies a threshold representing individual proclivities to reach to attribute differences. Two experiments demonstrated that changes in risk attitudes, from a gain to a loss situation, depended on the stimuli as well as on individuals' thresholds. Thresholds were generally lower in losses than in gains, indicating a risk-taking tendency. Thresholds were also lower when participants were endowed with greater savings. Model testing revealed better fits for the stochastic model than cumulative prospect theory (A. Tversky &. D. Kahneman, 1992).     

Race matters: the relation between race and general campus climate

This study examined students' perceptions of racial and academic climate as possible mediators of racial differences in the perception of the university's general campus climate (GCC). African American (n = 182), Latino (n = 212), Asian American (n = 358), and White (n = 671) students evaluated their perception of racial, academic, and general campus climates. As expected, racial minority students, particularly African Americans, perceived more negative general campus, racial, and academic climates than White students. Somewhat contrary to prediction, results indicated that racial differences in the perception of GCC were more closely related to perceptions of the academic than racial climate for members of all racial groups at all educational levels. Students' academic and racial experiences were the best predictors of their perception of GCC.     

Perception of coherent motion in random dot displays by pigeons and humans.

Pigeons and humans were required to discriminate coherent from random motion in dynamic random dot displays. Coherence and velocity thresholds were determined for both species, and both thresholds were found to be substantially higher for pigeons than for humans. The results are discussed with reference to differences in motion processing in mammals and birds. It is suggested that the inferior motion sensitivity of pigeons can be attributed to poorer spatiotemporal motion integration.     

A Longitudinal Study of Mothers' Overreactive Discipline and Toddlers' Externalizing Behavior

The association between children's externalizing behavior problems and mothers' overreactive discipline was examined in a longitudinally assessed sample of toddlers and their mothers. Path analyses indicated that mothers' overreactive discipline and children's externalizing behaviors were significantly and similarly stable over a 2 1/2-year period. No evidence of a cross-time influence of either variable on the other was observed. Mothers' overreactive discipline at Time 2 had a significant effect on Time 2 externalizing behavior. No significant effects of children's behavior on mothers' discipline were found. Mothers' depressive symptomatology and marital discord predicted initial overreactivity and were related to externalizing problems through their relations to overreactivity. The results support the appropriateness of implementing parenting interventions for externalizing problems before age 2 years.     

Assessing Culturally Different Students for Attention Deficit Hyperactivity Disorder Using Behavior Rating Scales

Behavior rating scales are commonly used in the assessment of attention deficit-hyperactivity disorder (ADHD). However, there is little information available concerning the extent to which scales are valid with culturally different students. This study explored the use of the ADHD-IV Rating Scale School Version with male Caucasian (CA) and African American (AA) students from ages 5 to 18 years. Teachers rated AA students higher on all symptoms across all age groups. LISREL analysis indicated that scale does not perform identically across groups. This was supported by the results of multidimensional scaling with suggested that there is a different relation between items across groups. Implications for research and practice are discussed.     

Does Evidence Presentation Format Affect Judgment? An Experimental Evaluation of Displays of Data for Judgments

Information relevant to a prediction was presented in one of eight formats: a table of numbers, a brief text, a longer biographical story, and five different types of bar graphs. Experimental participants made judgments of marathon finishing times based on information about the runners' ages, prior performance, training, and motivation. A regression analysis was used to assess the individual judges' relative weighting of the various types of information relevant to their predictions. The different formats for displaying information yielded different levels of accuracy and patterns of information utilization. In accordance with an explanation-based decision model, the text and story displays induced the heaviest reliance on information about the runners' motivation and prior performance and produced the most accurate judgments of marathon finishing times.     

Effects of maternal distraction and reprimands on toddlers' transgressions and negative affect

Misbehaviors occur at a high rate during the toddler years, and parents use a variety of methods to control these behaviors. The present investigation compared the effectiveness of two commonly used strategies, distraction and reprimands. Twenty mothers and their 17- to 39-month-old children were observed in a laboratory setting in which mothers used either distraction then reprimands or reprimands followed by distraction in response to their children's transgressions. When reprimands were used as the initial strategy, they were significantly more effective than distraction in controlling children's transgressions. Distraction was effective in maintaining low rates of transgression when preceded by a period of reprimands. However, when reprimands were instituted following a period of distraction, children's rates of negative affect increased significantly. Implications for the etiology and management of child behavior problems are discussed.     

Self-instruction training following neurological injury

The teaching of cognitive strategies is a potentially effective intervention technique for some students with acquired neurological injuries; however, educators have only infrequently reported on the systematic application of cognitive strategies to the academic challenges of this population. This study represents such an attempt by investigating the effects of a self-instruction strategy on the academic performance of a student with acquired neurological damage. The intervention programme pertained to performing 2-digit by 1-digit multiplication problems and consisted of: (1) a six-step multiplication procedure; (2) self-instruction cues; and (3) procedural prompts. The intervention package resulted in improved performance on the multiplication task with levels being maintained despite fading of procedural prompts and self-instruction cues. Results are discussed in terms of implications for training and future research.     

Differences in risk factors and adjustment for male and female delinquents in treatment foster care

Differences by gender in the presence of risk factors, patterns of previous delinquency, and response to treatment were examined for a sample of 88 adolescents who were placed in Treatment Foster Care. Females were found to have fewer foster parent-reported problem behaviors than their male counterparts during the first month of treatment. By month 6, problem behavior levels for males had dropped, while scores for female subjects had increased to the level of males at month 1. No differences in pre-post arrest data or program completion rates for males and females were found. Implications for research on and treatment of female adolescents with conduct problems are discussed.     

PROVIDING A LESS RESTRICTIVE ENVIRONMENT FOR PROFOUNDLY RETARDED PERSONS BY TEACHING INDEPENDENT WALKING SKILLS

A basic right of all handicapped persons is to live in the least restrictive environment possible. In this investigation, procedures were evaluated for teaching four institutionalized males with profound retardation necessary skills to increase their individual freedom of movement. Following baseline, a travel training program with a backward chaining format was implemented to teach each person to walk independently from his living area to school. Travel training included instructions, practice, praise, feedback, verbal reprimands, prompts, and edible reinforcers. Each resident began walking the entire distance to school independently during training and also began walking back to the living area, although the latter set of skills was not specifically trained. Following termination of the formal investigation, follow-up measures of 1 to 8 weeks showed the residents continued going to school independently. A survey of residential facilities in 43 states provided social validation for the seriousness of the problems associated with transporting seriously retarded persons to school. Also, time efficiency measures indicated that training independent travel resulted in reductions of staff time required in school transportation. Results were discussed in light of the potential contributions of behavior analysis in providing less restrictive environments for seriously handicapped persons.