biological explanation for a phobia

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who gives a biological explanation for phobias
Ohman
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what methodology was used?
lab experiment. Ps linked to a machine that would present pictures and deliver shocks. fear reaction measured through skin concordance
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how many conditions were there and what were these?
3 - electric shocks after either snakes, houses or faces
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how many participants were there
38F, 26M, 64 all together 20-30, psych students in sweeden
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describe the procedure
ps were given a shock at a level they individually rated as uncomfortable but not painful. Pics were presented on colour slides for 8 secs and if a shock was going to be given it occurred immediately as the pic was shown.
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describe the procedure
ps were seated comfortable and told they were experience shocks and see pictures. The order of pics was randomised, half the ps received shocks to snakes, and a quarter to the houses and faces.
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what did the baseline measurements show
all ps had a similar measure of skin concordance prior to the unconditioned stimulus being shown
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what were the findings
Ps shocked after they were shown pics of snakes 0.062 conductance to the snakes and 0.048 to H+F. control group shocked at H+F 0.037 and 0.030 to neutral stimuli
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what conclusions can be drawn
ps more likely to show fear response to snakes than houses or faces, showing a biological preparedness to develop phobias to objects that cause us danger
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what methodology was used?

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lab experiment. Ps linked to a machine that would present pictures and deliver shocks. fear reaction measured through skin concordance

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how many conditions were there and what were these?

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how many participants were there

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