摘要:

ABSTRACTUsing imaginal stimuli, the present investigation examined psychophysiological responses to imagery and the roles of Groves and Thompson's (1970) dual process theory and Sokolov's (1963) model of the defensive response(DR) in mediating the incremental stimulus intensity effect (ISIE). Experiment I was undertaken to determine whether phobic and neutral imagery could be discriminated by DRs and orienting responses (ORs). In a within groups design. 19 analogue speech phobics were exposed to 4 neutral and 4 phobic scenes. Dependent measures were skin conductance measures and second‐by‐second heart rate (HR). The results showed that DRs occurred only in response to phobic scenes. In a between groups design. Experiment II compared an incremental series (IS) of 16 phobic imaginal stimulus presentations to a constant series. Subjects were analogue speech phobics with 14 subjects per condition. For both conditions the last 4 scene presentations were the same. Dependent measures were second‐by‐second HR, second‐by‐second cephalic pulse amplitude, and skin conductance measures. The results showed greater habituation in the IS condition, but were inconclusive with regard to the roles played by dual process theory and the DR model

ISSN:0048-5772    

DOI:10.1111/j.1469-8986.1982.tb02609.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

ABSTRACTThe present study deals with the effects of stimulus significance and stimulus probability on skin conductance responses (SCRs). Eighty subjects (“informed” group) chose a numbered card, and 60 subjects (“uninformed” group) chose a blank card. All subjects were presented with a series of stimuli in the form of questions about numbers. The relative frequencies of the relevant (chosen) numbers were manipulated. The results showed expected effects of stimulus relevance and stimulus probability on SCRs. A more interesting result was an interaction of stimulus significance and relative frequency, meaning that the probability effect (greater responsivity to the less frequent stimulus) was stronger when the series of stimuli was comprised of relevant and neutral stimuli, than when two different neutral stimuli were used. This latter result was interpreted in terms of generalization of habituation. It was suggested that the relevance manipulation interferes with the generalization of habituation

ISSN:0048-5772    

DOI:10.1111/j.1469-8986.1982.tb02610.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

ABSTRACTIn many cases where SCR half‐recovery time cannot be measured because of post‐peak activity, quarter‐recovery time is measurable. Prediction of half from quarter recovery times is examined and the calculation of loge t/2 values for loge t/4 values is recomm

ISSN:0048-5772    

DOI:10.1111/j.1469-8986.1982.tb02611.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

ABSTRACTA circuit is described which measures applied electrode impedances using a 7 P.A RMS, 10 Hz sine wave current, and displays the reading in ohms on a small analog meter. The design uses a minimum of parts and power, drawing only 2mA from a 9 volt battery, yet is accurate lo within 2% and can easily be modified to fit a wide range of frequencies.

ISSN:0048-5772    

DOI:10.1111/j.1469-8986.1982.tb02612.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY