Suzanne G Helfer12
Stephanie L Fowler9
Justin A Wellman7
Paul E Weiland6
Heather M Rasinski4
12Suzanne G Helfer
9Stephanie L Fowler
7Justin A Wellman
6Paul E Weiland
Learn More
UNLABELLED Based on prior research identifying dispositional optimism as a predictor of placebo responding, the present study tested the hypothesis that individuals high in optimism would be more likely to respond to a placebo analgesic. Optimists and pessimists were randomly assigned to a placebo expectation condition or a no expectation condition before a(More)
OBJECTIVE Prior investigations have failed to find reliable personality differences in placebo responding. The present study tests the hypothesis that personality and situational variables interact to determine placebo responding. METHODS Optimists and pessimists were randomly assigned to one of three conditions. In the first condition, the participants(More)
Motivational factors receive little attention in current theories of the placebo effect. Reasons for this position are reviewed, and an argument is made for reconsidering the influence of motivation on the placebo effect. The authors hypothesize that nonconscious goals alter reactions to a placebo expectation. Specifically, the authors predict that the(More)
OBJECTIVE A prior investigation found that individuals low in optimism are more likely to follow a negative placebo (nocebo) expectation. The present study tested the hypothesis that individuals high in optimism are more likely to follow a positive placebo expectation. METHODS Individuals (N=56) varying in their level of optimism were randomly assigned to(More)
BACKGROUND Expectations congruently influence, or bias, pain perception. Recent social psychological research reveals that individuals differ in the extent to which they believe in expectation biases and that individuals who believe in expectation biases may adjust for this bias in their perceptions and reactions. That is, idiosyncratic beliefs about(More)
Research has shown that persons with mixed hand preference (i.e., who report using their non-dominant hand for at least some manual activities) display an increased tendency to update beliefs in response to information inconsistent with those beliefs. This has been interpreted as reflecting the fact that the left hemisphere maintains our current beliefs(More)
It has been theorized that expectations are an important causal determinant of the placebo effect. Placebo expectations, however, do not always yield placebo effects. In a laboratory study, we tested the hypothesis that one's level of somatic focus moderates the effect of placebo expectations on placebo responding. We also varied whether participants were(More)
Prior research has indicated that altering the perspective from which a videotaped confession is recorded influences assessments of the confession's voluntariness. The authors examined whether this camera perspective bias persists in more ecologically valid contexts. In Study 1, neither a realistic videotaped trial simulation nor potentially corrective(More)
Considerable evidence indicates that people overattribute causality to a given stimulus when it is salient or the focus of their attention--the so-called illusory-causation phenomenon. Although illusory causation has proved to be quite robust and generalizable, a compelling explanation for it has not been empirically documented. Four social-attribution(More)