Hypnotically induced limb anesthesia and adaptation to displacing prisms: Replication requires adherence to critical procedures.

Wallace, Benjamin; Fisher, Leslie E.

doi:10.1037/0021-843x.91.5.390

Cited by 12 publications

(7 citation statements)

References 4 publications

(8 reference statements)

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“…Subjects in this experiment underwent the procedural variation that Wallace and Fisher (1982) argued was necessary for producing elimination of the displacement aftereffect. Subjects pointed toward a visual target during five baseline and five posttest trials.…”

Section: Methodsmentioning

confidence: 99%

“…ination of the displacement aftereffect reported by Wallace and associates could have resulted from experimental demands conveyed to the high-susceptible hypnotic subjects. Alternatively, Wallace and Fisher (1982) suggested that the discrepancies between their findings and those of Spanos et al (1981) could have resulted from a procedural variation between these studies.…”

mentioning

confidence: 97%

“…However, in the studies by Wallace and associates (Wallace & Garrett, 1975;Wallace & Fisher, 1979) the target was removed during the adaptation trials. Wallace and Fisher (1982) argued that the presence of the target during adaptation trials in the Spanos et al (1981) study led hypnotic subjects to prism adapt despite their limb anesthesia and thereby to exhibit the aftereffect. Wallace and Fisher's (1982) hypothesis predicts that limbanesthetized hypnotic subjects will exhibit elimination of the displacement aftereffect if their pointing during adaption trials is not aimed at a visual target.…”

mentioning

confidence: 99%

“…Wallace and Fisher (1982) argued that the presence of the target during adaptation trials in the Spanos et al (1981) study led hypnotic subjects to prism adapt despite their limb anesthesia and thereby to exhibit the aftereffect. Wallace and Fisher's (1982) hypothesis predicts that limbanesthetized hypnotic subjects will exhibit elimination of the displacement aftereffect if their pointing during adaption trials is not aimed at a visual target. Alternatively, we hypothesized that hypnotically limb-anesthetized subjects would show the displacement aftereffect even when no target was present during adaption trials.…”

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confidence: 99%

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Hypnotic elimination of prism-induced aftereffects: Perceptual effect or responses to experimental demands?

Spaños¹,

Dubreuil²,

Saad³

et al. 1983

Journal of Abnormal Psychology

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Two experiments assessed adaptation to displacing prisms in hypnotically limbanesthetized subjects. Experiment 1 disconfirmed the hypothesis that the displacement aftereffect is eliminated in limb-anesthetized hypnotic subjects who adapt to prisms in the absence of a visual target. Such subjects showed as large a displacement aftereffect as control subjects who received neither a hypnotic induction procedure nor an anesthesia suggestion. Experiment 2 demonstrated that under some testing conditions hypnotic subjects complied with experimental demands and eliminated the behavioral (but not the perceptual) component of the aftereffect. Theoretical implications are discussed.Subjects who adapt to displacing prisms exhibit a perceptual aftereffect following prism removal. When pointing toward a visual target, they tend to point in the direction opposite to the prism-induced displacement. In several studies Wallace and his associates (Wallace & Garrett, 1973, 1975Wallace & Fisher, 1979) reported that hypnotic suggestions for limb anesthesia administered to highly susceptible subjects eliminated the displacement aftereffect. However, low-susceptible role-playing subjects, instructed to pretend that their arm was anesthetized, showed the displacement aftereffect. Wallace and Garrett (1973) hypothesized that hypnotic limb anesthesia interferes with proprioceptive feedback from the pointing limb and thereby prevents prism adaption. Spanos, Gorassini, and Petrusic (1981) were unable to confirm these results. Instead, they found that highly susceptible hypnotically limbanesthetized subjects, low-susceptible role players, and control subjects who prism adapted without special instructions, all showed large displacement aftereffects. Spanos et al. (1981) hypothesized that the elim-

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Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 97%

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confidence: 99%

mentioning

confidence: 99%

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Hypnotic elimination of prism-induced aftereffects: Perceptual effect or responses to experimental demands?

Spaños¹,

Dubreuil²,

Saad³

et al. 1983

Journal of Abnormal Psychology

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show abstract

“…Spanos et al (1981) failed to replicate our effect; that is, they reported that adaptation to prism displacement occurs regardless of whether subjects are asked to perform a task with hypnotic anesthesia in the adapting limb or without it. However, as we have previously argued (Wallace & Fisher, 1982), Spanos et al (1981) introduced a situation during prism exposure that overrode the effect of the hypnotic anesthesia. If a visual target is present to which subjects point during prism exposure, this provides individuals a reference point.…”

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confidence: 99%

Prism adaptation with hypnotically induced limb anesthesia: The critical roles of head position and prism type

Wallace

Fisher

1984

Perception & Psychophysics

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Moderating influences of hypnotic susceptibility on signal-detection task performance

Atkinson

Hustead

1992

Current Psychology

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Hypnotically induced limb anesthesia and adaptation to displacing prisms: Replication requires adherence to critical procedures.

Cited by 12 publications

References 4 publications

Hypnotic elimination of prism-induced aftereffects: Perceptual effect or responses to experimental demands?

Hypnotic elimination of prism-induced aftereffects: Perceptual effect or responses to experimental demands?

Prism adaptation with hypnotically induced limb anesthesia: The critical roles of head position and prism type

Moderating influences of hypnotic susceptibility on signal-detection task performance

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