Merit: A debate

Louis Settembrini is the pseudonym of a former chairman of one of the social science departments at the University of Rochester.     

Temporal integration in second-order conditioning and sensory preconditioning

Lick suppression experiments with rats revealed that the magnitude of both second-order conditioning (Experiment 1) and sensory preconditioning (Experiment 2) was superior when that conditioning was based on backward (US→CS) relative to forward (CS→US) first-order pairings of a CS and US. The superiority of backward relative to forward first-order conditioning on suppression to the higher order cues can be understood by assuming that the magnitude of higher order conditioning was determined by a memory representation of the higher order cues that provided information about the expected temporal location of the US. The results suggest that temporal information such as order between paired CSs and USs was encoded, preserved, and integrated with memory for the higher order stimuli. The relevance of these findings to memory integration in Pavlovian learning, the temporal coding hypothesis (Barnet, Arnold, & Miller, 1991; Matzel, Held, & Miller, 1988), backward excitatory conditioning, and the associative structure that underlies second-order Pavlovian fear conditioning are discussed.     

Locus of control, academic achievement, and Follow Through in Appalachia

The present study explored the development of locus of control in rural Appalachian Follow Through participants and in lower and middle-class comparison groups. The IAR was administered to 249 first-, third-, and sixth-grade children along with standardized achievement tests. Contrary to previous research, participation in Follow Through did not enhance internality; no social class differences were revealed. A significant social class by sex interaction was found. Strong support was not found for a developmental trend. The patterns of correlations between locus of control and achievement indicated a stronger relationship for the lower-class samples rather than for the middle-class as has been previously reported. Implications concerning different developmental antecedents in Appalachian homes as a function of sex-role socialization as well as the nature of future intervention research are discussed.     

Resources,models, and theory in the improvement of research in science education

Research in science education is an interdisciplinary effort, fully meriting the allocation of university resources and the serious effort of able scholars.     

The effects of age of viewer and gender of the narrator on children's visual attention and recall of story ideas

The purpose of this study was to investigate the effects of the age of viewers and the gender of the narrator in a film, and to examine the interaction between these two variables. Subjects in second and fifth grades were randomly assigned to two treatment groups. One group watched a film narrated by a female and the other watched the same film narrated by a male. As subjects watched the film, the experimenters measured their visual attention to the program. Recall of story ideas was also measured, using a multiple-choice test. The results indicated that the gender of the narrator influenced the recall of second-graders, but did not influence the recall of fifth-graders. Results suggest that older children pay greater visual attention to a program than younger children. Implications for developing audio-visual materials for children are discussed.     

The ADHD spectrum and everyday life: experience sampling of adolescent moods, activities, smoking, and drinking

Using an experience sampling methodology, the everyday lives of 153 adolescents with low, middle, or high levels of attention-deficit/hyperactivity disorder (ADHD) characteristics as assessed by either parent or teen were examined. Twice each hour, across two 4-day recording intervals, participants in a longitudinal study of stress and health risks logged their behaviors, moods, and social contexts. Those with high, in contrast to low, ADHD symptom levels recorded more negative and fewer positive moods, lower alertness, more entertaining activities relative to achievement-oriented pursuits, more time with friends and less time with family, and more tobacco and alcohol use. Fewer associations emerged with parent-defined than with teen-defined subgroups, although the differences in alertness, peer and family contexts, entertainment versus achievement activities, and substance use were consistent across sources. Even at subclinical levels, ADHD characteristics were associated with behavioral patterns and contexts that may promote peer deviancy training, unhealthy lifestyle behaviors, and vulnerability to nicotine dependence.     

Science and Mathematics Instruction of Beginning Elementary Teachers

Journal of Science Teacher Education -     

Overshadowing of explicitly unpaired conditioned inhibition is disrupted by preexposure to the overshadowed inhibitor

In two conditioned lick-suppression experiments with rats, the interaction of preexposure to a target stimulus and subsequent overshadowing of conditioned inhibition treatment was examined. Blaisdell, Bristol, Gunther, and Miller (1998) have demonstrated that stimulus preexposure and overshadowing counteract each other in their effects on Pavlovian excitation, producing strong excitatory responding to the target stimulus. In the present experiments, a conditioned inhibition analogue of this effect was examined. Overshadowing of conditioned inhibition (i.e., attenuation of inhibitory control of behavior by the target stimulus) was demonstrated when a more salient stimulus was compounded with the target inhibitor during conditioned inhibition training. However, the overshadowing deficit was attenuated by preexposing the target stimulus prior to overshadowing treatment. To account for this phenomenon, we contrast the comparator hypothesis (Miller & Matzel, 1988) with contemporary models that focus on associative acquisition.