This study investigated the differential influences of hypnotic susceptibility on Muller-Lyer illusion difference thresholds in waking and hypnosis using the psychophysical method of constant stimuli. As assessed by the Harvard Group Scale of Hypnotic Susceptibility, Form A (HGSHS:A) and the Group Stanford Hypnotic Susceptibility Scale, Form C (GSHSS:C), sixteen high (scores = 9–12) and sixteen low (scores = 0–3) hypnotizables participated. In counterbalanced sessions of waking and hypnosis, each subject was sequentially exposed to 110 computer-generated Muller-Lyer illusion pairs of comparison stimuli and a standard stimulus. Difference thresholds for high and low hypnotizables did not differ significantly in waking, but were significantly lower for high than low hypnotizables in hypnosis. Difference thresholds were also significantly lower for high hypnotizables in hypnosis than in waking. Low hypnotizables performed similarly in waking and hypnosis.
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References
1.
AtkinsonR. P., Individual Differences in Afterimage Persistence during Waking and Hypnosis: Effects of Hypnotizability and Visuospatial Skills, paper presented at the annual meeting of the Society for Clinical and Experimental Hypnosis, New Orleans, Louisiana, October 1991.
2.
AtkinsonR. P.CrawfordH. J., Individual Differences in Afterimage Persistence: Relationships to Hypnotic Susceptibility and Visuospatial Skills, American Journal of Psychology, 105, pp. 527–539, 1992.
3.
AtkinsonR. P.HusteadR. J., Moderating Influences of Hypnotic Susceptibility on Signal-detection Task Performance, Current Psychology: Research & Reviews, 11, pp. 195–202, 1992.
4.
WallaceB., Hypnotic Susceptibility and the Perception of Afterimages and Dot Stimuli, American Journal of Psychology, 92, pp. 681–691, 1979.
5.
WallaceB., Imagery Vividness, Hypnotic Susceptibility, and the Perception of Fragmented Stimuli, Journal of Personality and Social Psychology, 58, pp. 354–359, 1990.
6.
CrawfordH. J.MacDonaldH.HilgardE. R., Hypnotic Deafness: A Psychophysiological Study of Responses to Tone Intensity as Modified by Hypnosis, American Journal of Psychology, 92, pp. 193–214, 1979.
7.
SheehanP. W.DonovanP.McLeodC. M., Strategy Manipulation and the Stroop Effect in Hypnosis, Journal of Abnormal Psychology, 97, pp. 455–460, 1988.
8.
CrawfordH. J.WallaceB.NomuraK.SlaterH., Eidetic-like Imagery in Hypnosis: Rare but There, American Journal of Psychology, 99, pp. 527–546, 1986.
9.
WallaceB.FisherL. E., Hypnotically Induced Limb Anesthesia and Adaptation to Displacing Prisms, Journal of Abnormal Psychology, 91, pp. 390–391, 1992.
10.
CrawfordH. J., Cognitive and Physiological Flexibility: Multiple Pathways to Hypnotic Responsiveness, in Suggestion and Suggestibility: Theory and Research, GhorghuiV.NetterP.EysenckH.RosenthalR. (eds.), Springer-Verlag, Heidelberg, pp. 155–168, 1989.
11.
KihlstromJ. F., Hypnosis, Annual Review of Psychology, 36, pp. 385–418, 1985.
12.
CrawfordH. J.BrownA. M.MoonC., Sustained Attentional Abilities: Differences between Low and High Hypnotizables, manuscript submitted for publication, 1992.
13.
TellegenA.AtkinsonG., Openness to Absorbing and Self-altering Experiences (“Absorption”), a Trait Related to Hypnotic Susceptibility, Journal of Abnormal Psychology, 83, pp. 268–277, 1974.
14.
PriebeF. A.WallaceB., Hypnotic Susceptibility, Imaging Ability and the Detection of Embedded Objects, International Journal of Clinical and Experimental Hypnosis, 34, pp. 320–329, 1986.
15.
SheehanP. W., Hypnosis and the Process of Imagination, in Hypnosis: Developments in Research and New Perspectives, FrommE.ShorR. E. (eds.), Aldine, Chicago, 1979.
16.
SheehanP. W., Imagery and Hypnosis: Forging a Link, at Least in Part, Psychiatry and Behavior, 7, pp. 257–272, 1982.
17.
KumarV. K.PekalaR. J., Hypnotizability, Absorption, and Individual Differences in Phenomenological Experience, International Journal of Clinical and Experimental Hypnosis, 36, pp. 80–88, 1988.
18.
SnodgrassM.LynnS. J., Music Absorption and Hypnotizability, International Journal of Clinical and Experimental Hypnosis, 37, pp. 41–54, 1989.
19.
KarlinR. A., Hypnotizability and Attention, Journal of Abnormal Psychology, 88, pp. 92–95, 1979.
20.
GrahamC.EvansF. J., Hypnotizability and the Development of Waking Attention, Journal of Abnormal Psychology, 86, pp. 631–638, 1977.
21.
SpanosN. P.AnsariF.StamH. J., Hypnotic Age Regression and Eidetic Imagery: A Failure to Replicate, Journal of Abnormal Psychology, 88, pp. 88–91, 1979.
22.
SpanosN. P.StamH. J.RiversS. M.RadtkeH. L., Meditation, Expectation and Performance on Indices of Nonanalytic Attending, International Journal of Clinical and Experimental Hypnosis, 28, pp. 244–251, 1980.
23.
SpanosN. P.RiversS. M.GottliebJ., Hypnotic Responsivity, Meditation and Laterality of Eye Movements, Journal of Abnormal Psychology, 87, pp. 566–569, 1978.
24.
Van NuysD., Meditation, Attention, and Hypnotic Susceptibility: A Correlational Study, International Journal of Clinical and Experimental Hypnosis, 21, pp. 56–69, 1973.
25.
MillerR. J., Response to the Ponzo Illusion as a Reflection of Hypnotic Susceptibility, International Journal of Clinical and Experimental Hypnosis, 23, pp. 148–157, 1975.
26.
WallaceB., Hypnotic Susceptibility, Visual Distraction, and Reports of Necker Cube Apparent Reversals, Journal of General Psychology, 115, pp. 389–396, 1988.
27.
WallaceB.KnightT. A.GarrettJ. B., Hypnotic Susceptibility and Frequency Reports to Illusory Stimuli, Journal of Abnormal Psychology, 85, pp. 558–563, 1976.
28.
WallaceB.GarrettJ. B., Hypnotic Susceptibility and Autokinetic Movement Frequency, Perceptual and Motor Skills, 36, p. 1054, 1973.
29.
WallaceB.GarrettJ. B.AnstadtS. P., Hypnotic Susceptibility, Suggestion, and Reports of Autokinetic Movement, American Journal of Psychology, 87, pp. 117–123, 1974.
30.
WallaceB.FisherL. E., Consciousness and Behavior (3rd Edition), Allyn & Bacon, Boston, 1991.
31.
ShorR. E.OrneE. C., Harvard Group Scale of Hypnotic Susceptibility, Form A, Consulting Psychologists Press, Palo Alto, California, 1962.
32.
CrawfordH. J.AllenS. N., Group Stanford Hypnotic Susceptibility Scale, Form C, Virginia Polytechnic Institute and State University, Laboratory of Cognitive Processing, Blacksburg, 1982.
33.
WeitzenhofferA. M.HilgardE. R., Stanford Hypnotic Susceptibility Scale, Form C, Consulting Psychologists Press, Palo Alto, California, 1962.
34.
AtkinsonR. P.SewellM. M., Enhancement of Visual Perception under Conditions of Short-term Exposure to Sensory Isolation: A Comparison of Procedures for Altering Vigilance, Perceptual and Motor Skills, 67, pp. 243–252, 1988.
35.
BarabaszA. F., Effects of Hypnosis and Perceptual Deprivation on Vigilance in a Simulated Radar Detection Task, Perceptual and Motor Skills, 50, pp. 19–24, 1980.
36.
FehrF. S.SternJ. A., The Effects of Hypnosis on Attention to Relevant and Irrelevant Stimuli, International Journal of Clinical and Experimental Hypnosis, 15, pp. 134–143, 1967.
37.
KissenA. T.ReiflerC. B.ThalerV. H., Modification of Thermoregulatory Responses to Cold by Hypnosis, Journal of Applied Physiology, 19, pp. 1043–1050, 1964.
38.
SmytheL. P.LowryD., Auditory Vigilance during Hypnosis: A Brief Communication, International Journal of Clinical and Experimental Hypnosis, 31, pp. 67–71, 1983.
39.
KrippnerS.BindlerP. R., Hypnosis and Attention: A Review, American Journal of Clinical Hypnosis, 16, pp. 166–177, 1974.
40.
CrawfordH. J., Hypnotic Susceptibility as Related to Gestalt Closure Tasks, Journal of Personality and Social Psychology, 40, pp. 376–383, 1981.
41.
CrawfordH. J., Hypnotizability, Daydreaming Style, Imagery Vividness, and Absorption: A Multidimensional Study, Journal of Personality and Social Psychology, 42, pp. 915–926, 1982.
42.
CrawfordH. J., Enhanced Visual Memory During Hypnosis as Mediated by Hypnotic Responsiveness and Cognitive Strategies, Journal of Experimental Psychology: General, 112, pp. 662–685, 1983.
