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Titolo:
Independence of valence modulation and prepulse inhibition of startle
Autore:
Hawk, LW; Cook, EW;
Indirizzi:
Univ Alabama, Dept Psychol, Birmingham, AL 35294 USA Univ Alabama Birmingham AL USA 35294 pt Psychol, Birmingham, AL 35294 USA
Titolo Testata:
PSYCHOPHYSIOLOGY
fascicolo: 1, volume: 37, anno: 2000,
pagine: 5 - 12
SICI:
0048-5772(200001)37:1<5:IOVMAP>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
FEAR-POTENTIATED STARTLE; WEAK PRE-STIMULATION; INDIVIDUAL-DIFFERENCES; REFLEX MODIFICATION; SCHIZOPHRENIC-PATIENTS; ATTENTIONAL PROCESSES; TACTILE STARTLE; EMOTION; HABITUATION; STIMULUS;
Keywords:
emotion; attention; startle reflex; prepulse inhibition; eyeblink;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
50
Recensione:
Indirizzi per estratti:
Indirizzo: Hawk, LW SUNY Buffalo, Dept Psychol, Pk Hall, Buffalo, NY 14260 USA SUNY Buffalo Pk Hall Buffalo NY USA 14260 , Buffalo, NY 14260 USA
Citazione:
L.W. Hawk e E.W. Cook, "Independence of valence modulation and prepulse inhibition of startle", PSYCHOPHYSL, 37(1), 2000, pp. 5-12

Abstract

This study sought to determine whether prepulse inhibition and valence modulation of startle are independent, both within and across individuals. Acoustic probes (105 dB) were delivered as 68 undergraduates viewed pleasant, neutral, and unpleasant pictures. Weak acoustic stimuli (8 dB above background) preceded half of the probes by 120 ms. As expected, startles were larger during unpleasant than during pleasant pictures, and smaller on prepulsethan no-prepulse trials. In general, valence modulation and prepulse inhibition of startle were unrelated. That is, prepulse inhibition was consistent across affective states, valence modulation did not differ between no-prepulse and prepulse trials, and valence modulation and prepulse inhibition effects were uncorrelated across individuals. Analysis of raw and percent modification scores generally led to similar conclusions. It is concluded that valence modulation and prepulse inhibition are independent startle modulatory phenomena, although this conclusion is tempered by a finding of pool internal consistency reliability for valence modulation.

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Documento generato il 28/01/20 alle ore 02:41:30