PubMed Health⌕ Search

Biomedical subjects

D J Levis

Publications and source records attributed to D J Levis.

At least 19 recordsLinked to original sources
PubMed1991

Exposure to smoking-relevant cues: effects on desire to smoke and topographical components of smoking behavior.

The effects of exposure to two classes of smoking-relevant cues (environmental; negative affect) on desire to smoke and smoking topography were evaluated. Sixty chronic smokers were randomly assigned to one of six groups in a two-way ANOVA design in which the salience of environmental cues and presence of negative affective cues were manipulated. This was followed by a 20-minute interval during which ad libitum smoking was videotaped in an unobtrusive manner. Results indicated that the experimental manipulations differentially influenced ratings of desire and topographical components of smoking behavior. Implications are raised regarding the role of cue reactivity in the maintenance of smoking behavior.

Adolescent↗
PubMed1981

Extrapolation of two-factor learning theory of infrahuman avoidance behavior to psychopathology.

This paper involves a theoretical attempt to extend O. H. Mowrer's two-factor theory of infrahuman avoidance behavior to the area of human psychopathology, Central to any such theoretical extrapolation is the need to explain why human fears and avoidance behavior manifest such strong resistance to extinction while the abundance of infrahuman findings suggests that the extinction of such behaviors is rapid. The position is advanced that this noted paradox can be resolved both theoretically and empirically by modifying and extending the Solomon and Wynne conservation of anxiety hypothesis to include complex, serial ordered cues. The model presented also provides the rationale for an extinction approach to psychotherapy, referred to as implosive therapy which is briefly described. Supporting data for the model as well as alternative explanations are provided and discussed.

Animals↗