Experimental contamination occurs when
a. the experimenter informs participants of his or her hypotheses
b. participants are not randomly assigned to conditions
c. a variable unrelated to the study affects participants' responses
d. participants in different conditions interact with one another e. a pretest-posttest design is used
d
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In one study, a group of consumers were given an option to purchase jam with half of them choosing from six different flavors and the other half choosing from 24 flavors. The researchers found that the consumers with more choice expressed
a. more interest and were more likely to purchase a jam. b. more interest, but were less likely to purchase any jam. c. less interest, but were more likely to purchase a jam. d. less interest and were less likely to purchase any jam.
If different postsynaptic potentials occur at the same time but from different inputs, ___ will occur
A) temporal summation B) simultaneous summation C) spatial summation D) synaptic summation
Pedophilic disorder is associated with ______ activity in the amygdala and ______ thickness in some parts of the cortex.
a. decreased; decreased b. decreased; increased c. increased; decreased d. increased; increased
The __________ states that a weak synapse will be strengthened if its activation occurs at the same time that the postsynaptic neuron fires.
A. all-or-none principle B. law of effect C. perforant path hypothesis D. Hebb rule