Contextual Interference: A Response Planning Account

In two of the three experiments that are reported subjects were trained in either a blocked or a random practice schedule and allowed to self-select the amount of time they used to plan an upcoming movement. According to the reconstruction hypothesis (Lee & Magill, 1985) random practice participants engage greater movement planning processes (i.e. action plan re-construction) during acquisition than do their blocked practice counterparts. It was predicted that such reconstructive activity would be manifest as greater study time being used by random practice subjects as they readied themselves for an imminent response. Data from Experiments 1 and 2 supported this study time prediction while also revealing the typical retention benefit associated with random practice. Interestingly, the acquisition benefit often apparent with blocked practice was not evident when the random practice participants were given sufficient time to plan the upcoming response. These conclusions were supported by data from Experiment 3 that involved a direct manipulation of the amount of study time afforded random and blocked practice participants. Taken together, these data are consistent with the suggestion from the reconstruction hypothesis that more time is necessary for intratrial planning processes during random practice formats. Furthermore, acquisition differences that are commonly observed between high and low contextual interference practice conditions may, at least in part, be associated with the completion of the extra planning processes entertained by random practice participants as the movement is being executed.     

On the misuse of group membership

Group membership is analyzed from the perspective of developmental theory. Maladaptive or nontransitional uses of the groups of everyday life, such as work and social groups as well as therapy groups, are discussed and illustrated with clinical examples. It is recommended that therapists pay attention to the nature and meaning of their patients' involvements in these sorts of groups, keeping in mind that the meanings of such affiliations are particularly influenced by developmental factors.     

Effects of Expectancies and Personalized Feedback on Fat Consumption, Taste, and Preference

Previous studies have shown that people develop expectations about the taste and effects of consumed substances and that those expectations can guide future behavior, cognitions, and affect. Identifying expectancies for the taste of both low- and high-fat foods is important in determining people's reactions to changes in their diets. Study 1 was designed to determine the existence of expectancies for the taste of low-and high-fat foods and the effects of these expectations on food consumption and preference. Ninety-seven subjects tasted a bowl of ice cream and rated the taste on taste judgment forms. The fat content of the ice cream (high- versus low-fat) and the expectancy of high- versus low-fat content were independently manipulated using a balanced placebo design. Expectancy affected the consumption of ice cream under most circumstances: For women who received high-fat ice cream and for men, regardless of the ice cream received, consumption was higher when high-fat ice cream was expected than when low-fat ice cream was expected. Study 2 was designed to investigate the effects of educating individuals about the diet-cancer link on consumption and preference. Receiving information about diet and cancer, especially when the information was personalized, decreased overall consumption and reported preference. Current levels of daily fat consumption also affected laboratory consumption and preference. This study has several implications for interventions to lower dietary fat.     

The Development of the Attitudes Toward Censorship Questionnaire1

Two studies were conducted to develop a psychometrically sound scale to measure attitudes to ward censorship. In the first study, 37 initial items were administered to 109 college and high school students. Additional measures were also included for validation purposes. Factor analysis and item-total correlations were used to select items for the final scale. Results revealed two distinct factors alluding to the possibility of a multidimensional construct. Reliability coefficients indicated that both factors were internally consistent. Correlations with additional measures provided evidence for the criterion and convergent validity of the scale. The second study used a sample of 150 college students to replicate the initial findings and to establish testretest reliability.     

Visual search for simple volumetric shapes

Five experiments measured reaction time (RT) to detect the presence or absence of a simple volumetric shape (target) dependent on the number of display items (distractors) and their depicted three-dimensional (3-D) orientation. Experiments 1–4 examined every pairwise combination of two different simple volumetric shapes in two 3-D orientations. Conditions exhibiting “pop-out” could be predicted by differences in their two-dimensional (2-D) features. Conditions in which search was slower support previously found search asymmetries for particular 2-D features. When the distractors were a mixture of the other shapes in the same 3-D orientation, search was serial, except when the target had a curved principal axis (Experiment 5). The results suggest that these simple volumetric shapes are not processed preattentively.     

Psychiatric sequelae of low birth weight at 6 years of age

The study examined the association between low birth weight (LBW) (2,500 g) and attention deficit hyperactivity disorder (ADHD) in two socioeconomically disparate populations. LBW and normal birth weight (NBW) children from the 1983 to 1985 newborn lists of an urban and a suburban hospital in Southeast Michigan were randomly selected. A total of 823 children, 473 LBW and 350 NBW, participated. Data were gathered in 1990 to 1992, when the children were 6 to 7 years of age. The National Institute of Mental Health Diagnostic Interview Schedule for children—Parent version (DISC-P) was used to elicit information on DSM-III-R diagnoses of simple phobia, overanxious, separation anxiety, oppositional defiant, and ADHD. Teachers' ratings of behavior problems were obtained. LBW was associated with ADHD but not with childhood anxiety disorders or oppositional defiant disorder. The association was stronger in the urban than in the suburban population. Data from teachers' ratings revealed an association between LBW and attention problems. The prognostic significance of the observed psychopathology at 6 years of age requires follow-up assessment as the children mature.This research was supported by NIMH research grant MH-44586 and NIMH Research Scientist Development Award MH-00380 to Dr. Breslau.     

Mobilizing positive reinforcement in communities to reduce youth access to tobacco

A community intervention to mobilize positive reinforcement for not selling tobacco to young people was evaluated. The intervention had five components: (a) mobilization of community support, (b) merchant education, (c) changing consequences to clerks for selling or not selling to those under 18, (d) publicity about clerks’ refusals to sell, and (e) feedback to store owners or managers about the extent of their sales to adolescents. A multiple baseline design experiment was conducted, in which two small Oregon communities received the intervention, while two others continued in baseline. Outlets’ willingness to sell was assessed repeatedly by teenage volunteers. The intervention significantly reduced the proportion of stores willing to sell. Mobilizing socia and material reinforcement for stores not selling tobacco to young people is a viable means of reducing such sales. It may be especially valuable in communities where laws against sales to minors go unenforced. This paper supported in part by the National Cancer Institute Grant CA38273.     

The conjunction fallacy: A test of averaging hypotheses

The conjunction fallacy, in which individuals report that the conjunction of two events is more rather than less likely to occur than one of the events alone, is a robust phenomenon. We assessed the possibility that an analysis in terms of functional measurement methodology might be consistent with occurrence of the fallacy. A 3 × 3 design in which we varied the judged likelihood of the two components constituting the conjunction permitted us to assess the possibility that subjects judge the likelihood of conjunctions by averaging the likelihood of their component parts. The results were consistent with this possibility, and this interpretation was supported by analysis of the results in terms of functional measurement methodology.     

Multicultural Training in University Counseling Center Predoctoral Psychology Internship Programs: A Survey

Research indicates that graduate programs in counseling and clinical psychology are beginning to include more courses on multicultural issues. Little data is available, however, concerning the inclusion of training in multicultural issues in predoctoral psychology internship training programs. This study examined the amount and type of such training actually occurring at predoctoral psychology internship training programs in university counseling centers.