Conditioned enhancement of human's liking for flavor by pairing with sweetness

This paper reports a procedure, like classical conditioning, that produces enhancement of liking for flavors by humans. The procedure is “pairing” of a relatively neutral flavor with sugar (a hedonically positive taste). Specifically, subjects drank 24 small samples of flavor A sweetened and 24 small samples of flavor B unsweetened. They were then tested for their liking for flavors A and B, both sweetened and unsweetened. In three different studies, varying in a number of aspects of stimulus presentations and context, a relative enhancement in liking for flavor A appeared both on the day of exposure and 1 week later. An absolute enhancement in liking of flavor B (a “mere exposure” effect) also occurred in two of the three experiments.     

The long-term outcome of a personal network-oriented HIV prevention intervention for injection drug users: The SAFE study

Social influence processes have been found to affect numerous drug and health-related behaviors. We postulated that by using a network-oriented intervention it may be possible to capitalize on social influence processes to reduce human immunodeficiency virus (HIV) risk behaviors. The present study used an experimental study design for delivering a psychoeducational acquired immunodeficiency syndrome (AIDS) preventive intervention to injection drug sharing networks. Participants were recruited from the ALIVE study, an epidemiological study in Baltimore. In the present paper we examine the self-reported behavioral outcomes of 117 injection drug users 18 months after the baseline interview. HIV seronegative experimental participants reported significantly less frequent needle sharing and less injecting of heroin and cocaine than controls. In multiple logistic regression models of HIV seronegative participants, there was a significant negative association between assignment to the experimental group and the HIV-related behaviors of needle sharing and sharing of cookers in the prior 6 months; controls were 2.8 times more likely than experimentals to report needle sharing and were 2.7 times more likely to report sharing cookers. The results of this 18-month follow-up suggest that among injection drug users network-oriented interventions may be a promising approach to HIV prevention.     

GRIDLAT: Toward a constructivist methodology to investigate brain lateralization

Verbal conceptual processes and emotional experience (in general, as well as positive vs. negative) are phenomena that appear to have lateralized correlates. A general method is herein put forth by which researchers can investigate the lateralization of various constructive processes in the brain. The technique, called GRIDLAT, is a computerized repertory grid protocol that displays element and construct information to a single hemisphere (vis à vis visual field) at a time during grid elicitation. GRIDLAT is described in detail. Then some preliminary findings are described, and several dependent variables possible in studies employing methods such as GRIDLAT are discussed.     

TREATING TOTAL LIQUID REFUSAL WITH BACKWARD CHAINING AND FADING

In this study, we report on a 12-year-old boy with autism, mental retardation, and a history of severe gastrointestinal problems who presented with total liquid and food refusal. Backward chaining was used to shape drinking from a cup, and a fading procedure was used to increase the quantity of water he was required to drink.     

Ability and effort weights in pay level and pay increase decisions

It was hypothesized that ability, effort, and the interaction between ability and effort would influence pay level and pay increase decisions. An experiment was conducted with 66 human resource professionals to test this hypothesis. The results indicate that pay level decisions are influenced primarily by ability, and pay increase decisions are influenced primarily by the interaction between ability and effort. The results are discussed in the context of the traditional compensation model which suggests that ability should influence pay level, but not pay increase, and that effort should influence pay increase, but not pay level. It was concluded that the distinction currently being made between person and job based pay plans may not be meaningful.Portions of this paper were presented to the PHR division of the Southern Management Association, Atlanta, November, 1991.The authors wish to thank Marcia Miceli, Eileen Hogan, and Don Eskew, for their helpful comments on earlier drafts.     

Effects of movement duration and visual feedback on visual and proprioceptive components of prism adaptation

While looking through laterally displacing prisms, subjects pointed sagittally 80 times at an objectively straight-ahead target, completing a reciprocal out-and-back pointing movement ever 1, 3, or 6 s. Visual feedback was available early in the pointing movement or only late at the end of the movement. Aftereffect measures of adaptive shift (obtained after every 10 pointing trials) showed adaptive change only in limb position sense (i.e., proprioceptive adaptation) when movement duration was 1 s, regardless of visual feedback condition; but as movement duration increased, adaptive change in the eye position sense (i.e., visual adaptation) increased while proprioceptive adaptation decreased, especially for the late visual feedback condition. Regardless of visual feedback condition, proprioceptive adaptation showed the maximal rate of growth with the 1-s movement duration, whereas visual adaptation showed maximal growth with the 6-s movement duration. These results provide additional support for a model of adaptive spatial mapping in which the direction of strategically flexible coordination (guidance) between eye and limb (and consequently the locus of adaptive spatial mapping) is jointly determined by movement duration and timing of visual feedback. An additional effect of movement duration is to determine the rate of discordant inputs. Maximal growth of adaptation occurs when the input rate matches the response time of the spatial mapping function.     

Distressed and nondistressed third- and sixth-grade children's self-reports of life events and impact and concordance with mothers

This study examined the concordance of third- and Sixth-grade distressed and nondistressed children's self-reports of the occurrence and perceived impact of life events that had occurred during the preceding 12 months with their mothers' perceptions. The study also examined whether maternal self-reports of dysphoria affects concordance between mother/child dyads on children's self-reports of occurrence and perceived impact of life events. Eighty-eight mother/child dyads, matched on Children's Depression Inventory scores, grade, sex, race, and school were included. Results indicated that distressed children endorsed more items on the Coddington Life Events Record (LER), and perceived them more negatively, than nondistressed children. Small, but statistically significant concordance rates were found between dyads on the occurrence of life events and the perceived impact of these events: Distressed children and their mothers had more mutually endorsed items than nondistressed children and mothers, and third-grade children had higher concordance rates with their mothers when compared to sixth-grade children. Third-grade children also appeared to commit more errors of commission on the LER. Finally, Maternal distress mediated mother/child concordance. Possible explanations for these results and future research directions are discussed.     

EFFECTS OF COOPERATIVE LEARNING GROUPS DURING SOCIAL STUDIES FOR STUDENTS WITH AUTISM AND FOURTH-GRADE PEERS

We investigated the use of cooperative learning groups as an instructional strategy for integrating 2 students with autism into a fourth-grade social studies class. Baseline consisted of 40 min of teacher-led sessions including lecture, questions and discussion with students, and the use of maps. The intervention condition consisted of 10 min of teacher introduction of new material, followed by cooperative learning groups that included tutoring on key words and facts, a team activity, and a whole class wrap-up and review. An ABAB design showed increases for target students and peers for the number of items gained on weekly pretests and posttests, the percentage of academic engagement during sessions, and durations of student interaction during the intervention.     

Children's appraisals of sex-typed behavior in their peers

Four experiments evaluated the effect of variations in sex-typed behavior in hypothetical peers on children's ratings of friendship. In all four studies, the children were heterogeneous with regard to social class, ethnicity, and race. In Experiment 1, children (71 boys, 90 girls) in Grades 3–6 read five stories about a target boy and in Experiment 2 (102 boys, 137 girls) about a target girl who displayed four sex-typed behaviors that ranged from exclusively masculine to exclusively feminine. In Experiment 1, boys preferred the exclusively masculine boy most as a friend. With each addition of a feminine behavior (and corresponding subtraction of a masculine behavior), the friendship ratings became increasingly negative. In contrast, the girls preferred the exclusively feminine boy most as a friend and, with each addition of a masculine behavior, the friendship ratings became increasingly negative. In Experiment 2, the converse was found although girls' ratings of friendship were less sharply affected by the target girl's sex-typed behavior than was observed for boys' ratings in Experiment 1. In Experiment 3, children (33 boys, 38 girls) in Grades K—2 were read three stories about a target boy, accompanied by detailed chromatic illustrations, whose four sex-typed behaviors were exclusively masculine, equally masculine and feminine, or exclusively feminine. The boys had significantly more favorable friendship ratings than the girls; however, in contrast to Experiments 1 and 2, the target boy's sex-typed behavior did not affect friendship ratings of either boys or girls. Experiment 4 (28 boys, 27 girls) repeated the procedure of Experiment 3 with children in kindergarten and Grade 1; in addition, the children made forced-choice friendship ratings for each of the three possible story pairs. In contrast to Experiment 3, boys' friendship ratings were affected by the target boy's sex-typed behavior, as observed in Experiment 1, but girls' friendship ratings were not. However, in the forced-choice situation, the boys significantly preferred the exclusively masculine boy whereas the girls significantly preferred the exclusively feminine boy. The results were discussed in relation to the influence sex-typed behavior has on modifying the effects of a peer's sex on affiliative preference and sex differences in appraisals of cross-gender behavior, including the concept of threshold effects.