A system for the assessment of human performance in concurrent verbal and manual control tasks

A multipurpose laboratory system incorporating a voice interactive terminal and graphic display system is described. The facility is designed to investigate some aspects of human performance on concurrent verbal and tracking tasks. The results of a pilot study showing decrements in dual-task performance are reported.     

Life Change and Psychological Distress: The Role of Perceived Control and Desirability

Two studies were conducted to specify what attributes of life change events increase the risk of future psychological distress. It was hypothesized that the events perceived as both undesirable and uncontrollable would be most likely to be linked to subsequent distress. In the fiist study, which employed a retrospective methodology, 117 college students reported the life changes that occurred to them over a 3-month span and indicated the desirability and controll-ability of each event. These subjects also responded to an inventory, used in studies of community mental health, to assess symptoms of psychological distress. The findings indicated that only events perceived as both undesirable and uncontrollable were related to the incidence of psychological distress symptoms. Study 2 examined the same hypothesis in a prospective methodology. As in Study 1, only undesirable, uncontrollable life events were significantly related to subsequent psychological distress symptoms. The results of both studies implicate the importance of perceptions of control over aversive events in understanding the link between real life outcomes and illness.     

Reality therapy: Icing on the cake of behavior modification

The paper presents a conceptual model for therapeutic intervention based on a behavioral orientation. Behavioral therapy is viewed on a continuum ranging from basic operant techniques to cognitive strategies applied to human interaction. It is hypothesized that the elements of reality therapy, with its emphasis on human interaction, are needed to provide closure to the therapeutic intervention and to help maintain new coping behaviors. Utilizing the context of an institutionalized client, suggestions for how this process might occur are discussed.     

Forest lights: Notes on the conceptualization of the unconscious

Using the metaphor of lights appearing unexplained in the night, the author argues for a conceptualization of the unconscious based on a posture of trust and acceptance rather than one of fear and explanation.His last book,Idea and Experience, dealt with Husserl's project of phenomenology inIdeas I. He has recently completed another book,The Embers and the Stars: A Philosophical Inquiry into the Moral Sense of Nature.     

Automatic stimulus presentation for the proboscis extension reflex in diptera

An apparatus is described that automates the elicitation of the proboscis extension reflex (PER) in dipterans. The PER has been used as a measure of both classical conditioning and central excitation. Most studies of PER have employed manual stimulation, which adds inter- and intraexperimenter differences in technique as another source of variance. The advantages of this apparatus are (1) elimination of individual differences in manual techniques of experimenters as a possible source of error variance and (2) capability of stimulating several flies individually during a single session. An experiment is reported comparing the manual and automated methods.