Decision Theory and the Sale of Alcohol1

Two studies examined the role of representativeness in determining the legal age of customers seeking to purchase alcohol. In Study 1, subjects were presented with a series of common grocery products along with an alcoholic beverage and a shopper. Results indicated that products which cued an older consumer produced higher age estimates of the shopper and decreased the likelihood that they would be asked to provide proof of legal age. Study 2 extended these findings in two important ways: (a) The target was presented as either a college student or parent and (b) individual differences in self-consciousness were related to susceptibility to manipulations of representativeness. Results indicated that the parent/student manipulation affected both the decision to request identification and age estimates of the target. Age estimations were positively related to individual differences in public self-consciousness, whereas the decision to request identification depended upon individual levels of social anxiety and private self-consciousness. Implications of these data for restricting access to alcohol among minors are considered.     

Humour and creativity*

‘He laughed to free himself from his mind's bondage’ (James Joyce). ‘It is very strange that I never get any encouragement from psychiatric audiences when I want to talk about art or humour’ (Gregory Bateson). ‘Let us not always assume that a sense of humour is always mocking. It could be loving’ (Gregory Bateson).     

Exploring adolescent social media and internet gaming addiction: The role of emotion regulation

Behavioral addictions such as social media addiction and internet gaming disorder are prevalent among adolescent populations. Although studies have investigated predictors of these addictive behaviors with international samples of adolescents, less is known about American adolescents. In this study, we investigated the predictive nature of emotion regulation after controlling for age, gender, and race with regard to social media addiction and internet gaming disorder severity. Results indicate that gender and emotion regulation significantly predicted both forms of behavioral addictions with small to moderate effects. Specifically, female gender and lower emotion regulation significantly predicted social media addiction and male gender and lower emotion regulation significantly predicted internet gaming disorder severity. Implications for mental health professionals are discussed.     

Visual Information and Object Size in the Control of Reaching

The role of vision in the control of reaching and grasping was investigated by varying the available visual information. Adults (N = 7) reached in conditions that had full visual information, visual information about the target object but not the hand or surrounding environment, and no visual information. Four different object diameters were used. The results indicated that as visual information and object size decreased, subjects used longer movement times, had slower speeds, and more asymmetrical hand-speed profiles. Subjects matched grasp aperture to object diameter, but overcompensated with larger grasp apertures when visual information was reduced. Subjects also qualitatively differed in reach kinematics when challenged with reduced visual information or smaller object size. These results emphasize the importance of vision of the target in reaching and show that subjects do not simply scale a command template with task difficulty.     

An Evaluation of Arizona's July 1982 Drunk Driving Law: Effects on the City of Phoenix1

In July 1982, Arizona implemented a Driving While Intoxicated (DWI) law which mandated severe penalties for DWI convictions. Interrupted time series analyses conducted using data from the city of Phoenix showed an initial estimated reduction of 7.44 vehicular fatalities per month when the law went into effect, which then slowly returned to baseline. In a switching replication, parallel results were found in San Diego for the effect of a similar January 1982 California law. No changes in fatalities corresponding to the implementation of the Arizona or California laws were found in the El Paso comparison series. Time series analyses of DWI-related law enforcement activity in Phoenix showed no change associated with the implementation of the Arizona DWI law. Analyses of newspaper coverage in Phoenix suggested that another substantial decrease in fatalities occurred prior to the implementation of the law, coinciding with the beginning of intense media coverage of the DWI issue.