Lure similarity affects visual episodic recognition: Detailed tests of a noisy exemplar model

Summed-similarity models of visual episodic recognition memory successfully predict the variation in false alarm rates across different test items. With data averaged across subjects, Kahana and Sekuler demonstrated that subjects' performance appears to change along with the mean similarity among study items; with high interstimulus similarity, subjects were less likely to commit false alarms to similar lures. We examined this effect in detail by systematically varying the coordinates of study and test items along a critical stimulus dimension and measuring memory performance at each point. To reduce uncontrolled variance associated with individual differences in vision, the coordinates of study and test items were scaled according to each subject's discrimination threshold. Fitting each of four summed-similarity models to the individual subjects' data demonstrated a clear superiority for models that take account of interitem similarity on a trialwise basis.     

Is Television a Health and Safety Hazard? A Cross‐Sectional Analysis of At‐Risk Behavior on Primetime Television1

Twenty‐four top‐rated primetime television shows were observed weekly during 1997 and 1998 (242 episodes). The study examined behaviors of vehicle occupants; violence and risky sex; and use of drugs, alcohol, and tobacco. Findings were compared to studies conducted in the mid‐1980s and 1994. Characters in vehicles were unrestrained 74% of the time in 1998, compared to 73% and 78% in 1994 and 1986, respectively. Violence, risky sex, and substance use were shown in 47%, 29%, and 55%, respectively, of 30‐min intervals observed in 1998. Similar data were recorded in 1994, with some negligible improvements. Results indicated that risky behaviors were rarely followed by punishing consequences, and irresponsible behaviors were modeled on primetime television. The relevance to social modeling and public health is discussed.     

Phyloanalysis: Theoretical and Practical Considerations on Burrow's Group Analytic and Socio-Therapeutic Method by W. Riese and H. Syz

Abstract

Women in an eating disorders partial hospital program and a psychiatric partial hospital program were compared on a self-report measure of group climate following a psychodynamic-interpersonal therapy group. Those with eating disorders experienced their groups as more engaged and as more avoiding than those in the psychiatric partial hospital group. Therapists may be able to use initial heightened engagement in eating disorder groups to counteract the tendency to avoid content.     

Personality disorders associated with substance use among American and Greek adolescents

A study was conducted to investigate the association between personality disorder (PD) symptomatology and substance use among adolescents in community settings in the United States and Greece. The Structured Clinical Interview for DSM-IV Personality Disorders and the Adolescent Health Behavior Survey were completed by 37 male and 84 female adolescents, ages 15 to 18, who were recruited from an adolescent medical clinic and schools in and near New York City (n = 71) and Heraklion, Greece (n = 50). Results indicated that: (1) adolescents with PDs reported more frequent alcohol consumption during the past year than did those without PDs; (2) adolescents with borderline PD reported more cigarette smoking and heavy alcohol consumption than did those without borderline PD; (3) adolescents with antisocial PD symptomatology reported greater alcohol, cigarette, and illicit drug use than did those without antisocial PD symptomatology; and (4) although more American (30%) than Greek (4%) adolescents reported illicit substance use, differences were not observed in the prevalence of alcohol use, cigarette use, or personality disorders as a function of nationality.     

NATURALISTIC OBSERVATIONS OF BEER DRINKING AMONG COLLEGE STUDENTS

We observed the beer drinking behavior of 308 university students in several bar and party settings. The following relationships were found: (a) males drinking beer in bars consumed 0.92 oz per min; (b) females drank less beer than males, and stayed in a bar for a longer time period; (c) patrons drank significantly more beer when drinking in groups and when purchasing beer in pitchers versus cups or bottles; and (d) intervals between party arrival and first drink and between party departure and last drink varied inversely with blood alcohol concentration. We discuss these findings with regard to developing interventions to prevent alcohol-impaired driving.     

A university-based incentive program to increase safety belt use: Toward cost-effective institutionalization

A cost-effective incentive program to increase safety belt use was implemented by the campus police of a large university. For each of the 3-week intervention periods during three consecutive academic quarters, the 22 campus police officers recorded the license plate numbers of vehicles with drivers wearing a shoulder belt. From these numbers, 10 raffle winners were drawn who received gift certificates donated by community merchants. Faculty and staff increased their belt usage markedly as a result of the "Seatbelt Sweepstakes," whereas students increased their belt use only slightly. A cost-effectiveness analysis indicated that the sweepstakes cost an average of $0.98 per each newly buckled driver. During each sweepstakes intervention, officers' belt usage increased significantly, but diminished to initial baseline levels after the final withdrawal of the program. Surveys of officers' opinions indicated that the police would accept the program demands as a regular task requirement. This result and the fact that program promotion and coordination were eventually taken over by two student organizations suggest that institutionalization of the "Seatbelt Sweepstakes" is feasible.     

Computer simulation of some of the motor circuits underlying Parkinson’s disease

Many researchers have published functional models of brain structures involved in Parkinson’s disease. These models include the primary structures of the basal ganglia and related cortical areas, and have hypothesized normal and dysfunctional states. Simple computer simulation of the hypothesized excitatory and inhibitory interactions among brain structures can be used to evaluate these models. A computer simulation can be programmed to simulate normal function, disease function, and treatment effects described in published models.