Pausing phenomena: Influence on the quality of instruction

This report summarizes work of 7 years on the influence of a variable called “wait-time” on the development of language and logic of children taking part in elementary science programs. Analysis of over 300 classroom tape recordings showed mean pauses to be on the order of 1 sec; that is, after a teacher asked a question, students had to begin a response within an average time of 1 sec. If they did not, the teacher typically repeated, rephrased or asked a different question, or called on others. A second wait-time is involved: when a student makes a response, the teacher normally reacts or asks another question within an average time of 0.9 sec. This study investigates the consequences of manipulating both species of wait-time. When mean wait-time of 3–5 sec is achieved through training, analysis of more than 900 tapes shows changed values on eight student variables: (1) the length of response (number of words) increases, (2) the number of unsolicited but appropriate responses increases, (3) failures to respond decrease, (4) incidence of speculative responses increases, (5) incidence of student-student comparisons of data increases, (6) incidence of evidence-inference statements increases, (7) frequency of student-initiated questions increases, and (8) the variety in type of verbal moves made by students increases. Servochart plots of recordings show that students discussing science phenomena tend to speak in bursts, with intervals of as much as 3–5 sec between bursts being fairly common provided they are not interrupted. The average post-student-response wait-time of 0.9 sec apparently intervenes between bursts to prevent completion of a thought. The classroom is conceptualized as a two-player game in which the quality of inquiry will tend to improve when there is a better equity in the distribution of moves between the players. The teacher is treated as one player and the collection of students as the second player. Changes in wait-time shift the game toward a more equitable state. Over time, a classroom or instructional group on the prolonged wait-time schedule undergoes certain spontaneous changes. Two teacher variables change: (1) response flexibility scores increase, and (2) teacher questioning patterns becomes more variable. There is some indication that teacher expectations for performance of students rated as relatively slow improves.     

The layman's use of trait and behavioral information to predict behavior

This study investigated conditions that determine subjects' preferences for information about another person's traits versus his specific past behavior in order to predict his future behavior. The similarity-dissimilarity between the situation for which past behavior was available and the one to which predictions had to be made strongly influenced the choice of specific behavioral information versus more general trait information. As expected, behavioral information was preferred most when the situation to which behavior had to be predicted was highly similar to the one for which the past behavioral data were available. On the other hand, more general trait information was preferred in predicting to situations that were not directly similar to those for which past behavioral information was available. The effect of the temporal span covered by available information was also explored.     

State work engagement and state affect: Similar yet distinct concepts

State work engagement (SWE), a multidimensional construct of work-related well-being, was originally conceptualized as a trait, but diary studies have revealed substantial within-person fluctuations. Given that SWE is conceptualized as a work-related affective-motivational construct, the question arises as to whether SWE can be differentiated from other affective constructs. Thus, the goal of the present study was to compare SWE and state affect with respect to their degree of within-person variability and to examine their distinct relationships with health and performance variables (i.e., sleep quality and job performance). Fifty-two employees (44% female) participated in the study, which included 3 assessments per day over the course of 2 weeks. Our results revealed that energetic arousal and tense arousal fluctuated more strongly within days than vigor and absorption. Multilevel analyses demonstrated that high sleep quality predicted higher state affect but not higher SWE. In addition, vigor exhibited an inverted U-shaped relation with performance. In sum, SWE as a time-varying construct showed some overlap with state affect but also demonstrated discriminant validity.     

Understanding the contribution of target repetition and target expectation to the emergence of the prevalence effect in visual search

Behavior in visual search tasks is influenced by the proportion of trials on which a target is presented (the target prevalence). Previous research has shown that when target prevalence is low (2 % prevalence), participants tend to miss targets, as compared with higher prevalence levels (e.g., 50 % prevalence). There is an ongoing debate regarding the relative contributions of target repetition and the expectation that a target will occur in the emergence of prevalence effects. In order to disentangle these two factors, we went beyond previous studies by directly manipulating participants’ expectations regarding how likely a target was to appear on a given trial. This we achieved without using cues or feedback. Our results indicated that both target repetition and target expectation contribute to the emergence of the prevalence effect.     

Effects of environmental enrichment on cognitive performance of pigs in a spatial holeboard discrimination task

This study investigated the effects of environmental enrichment on the cognitive performance of female conventional farm (growing) pigs in a spatial holeboard task. Ten pairs of littermates matched for weight were used. From each litter, one piglet was randomly assigned to a barren environment; the other was assigned to an enriched environment from 4 weeks of age. The enriched environment was double the size of the barren environment, had a floor covered with straw, a rooting area filled with peat, and one of the four different enrichment toys which were exchanged daily. Starting at 11 weeks of age, all pigs were tested in a spatial holeboard discrimination task in which 4 out of 16 holes were baited. Furthermore, basal salivary cortisol levels of all pigs were determined after the end of all testing. All pigs were able to acquire the pattern of baited holes (acquisition phase, 40 trials) and the diagonally mirrored pattern (reversal phase, 20 trials). During the acquisition phase, the reference memory performance of the enriched-housed pigs was better than that of their barren-housed littermates, i.e. they reduced visits to the unbaited set of holes. During the reversal phase, enriched-housed pigs had a better general working memory performance than the barren-housed pigs as indicated by reduced revisits to holes already visited during a trial, irrespective of whether they were of the baited or the unbaited set. The enriched-housed pigs also searched for the hidden bait faster during both phases. The environments did not affect basal salivary cortisol levels. In conclusion, environmental enrichment slightly improved the cognitive performance of pigs in a spatial learning task. We hypothesise that the long period of habituation to and testing in the holeboard acted as enrichment that partially reduced the effects of barren housing.     

Skills training in the long-term management of stress and occupational burnout

The current managed healthcare environment stresses brief and effective short-term therapy. However, often this short-term treatment does not lead to long-term behavioral changes and clients return to therapy many times for help with the same dysfunctional behavioral patterns. The main problem with these traditional forms of treatment is the assumption that clients have the basic skills to change their ineffective behaviors. Yet, many people lack the basic skills to manage our highly stressful society, and may take years to master new behavioral management skills. Examining the relationship between stress and coping, this study explored both short-and long-term approaches to behavioral change relative to occupational burnout, and focused upon the teaching of skills to manage stress. Subjects who participated in a 6-week stressmanagement program reported only temporary decreases in burnout, while those subjects who received 1-hour coping “refresher” sessions at 5 months, 11 months, and 17 months showed consistent decreases in burnout throughout a 2 1/2 year period. These results suggest that psychologists can be much more effective behavioral change agents through long-term approaches that emphasize teaching new skills to manage chronic behavioral problems. Given the changes in the health insurance industry and the way therapeutic services are provided, the field may need to rethink approaches that are grounded in personality theory and abnormal psychology to approaches that emphasize principles of learning theory.     

Aggression and peer victimization as predictors of self‐reported behavioral and emotional adjustment

The relative contributions of aggression and victimization to the prediction of self‐reported emotional and behavioral difficulties over and above self‐reported prior problems were investigated in a 1‐year longitudinal study. Fourth‐, fifth‐, and sixth‐graders (N = 471) completed peer nominations of aggression and victimization as well as self‐report measures of social, behavioral, and emotional problems at baseline and at 1‐year follow‐up. Peer aggression added to the prediction of externalizing problems, specifically, self‐report of aggression and delinquency. In contrast, victimization by peers contributed to self‐reported unpopularity but not depression. Victimization among girls was also predictive of subsequent self‐reported delinquency. Theoretical and practical implications of the findings, as well as future directions for research, are discussed. Aggr. Behav. 26:345–358, 2000. © 2000 Wiley‐Liss, Inc.