Using a tickle apparatus, forty-three participants were tickled on their feet and forearms to investigate a sequence effect (an increase in foot ticklishness on the second trial of a series) reported in two previous studies. Assuming this effect was due to a local and not a central mechanism, we predicted that the effect would occur if the second trial was on the same foot but would not occur if it was switched to the other foot. We predicted that if the sequence effect is driven by sensory motor processes similar to those proposed in efference motor hypotheses, the sight of an approaching tickle stimulus should affect ticklishness over trials relative to an eyes closed condition. The foot sequence effect was not replicated. There was a significant interaction for the switch-foot condition, but the eyes open or closed condition was not significant.
|Adviser||Paul E. Sheldon|
|Subjects||Behavioral sciences; Psychology; Experimental psychology|
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