When carrying out a t test for independent means
A) the medians of the two populations are assumed to be equal.
B) the null hypothesis is rejected if the computed t score is more extreme than the cutoff t score.
C) only the .01 significance level should be used because of the greater power compared to a t test for dependent means.
D) only the .10 significance level should be used because of the assumption that the variances of the two distributions should be equal.
B
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____________________ sleep consists of Stages 3 and 4 sleep, during which low-frequency delta waves become prominent in EEG recordings
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Memory researcher Allan Paivio's ____________________ theory of memory is enhanced by forming both semantic and visual codes since either can lead to recall
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Have you ever tried to think of the words and hum the melody of one song while the radio is playing a different song? People have often noted that this is very difficult to do. This difficulty can be understood as
a. articulatory suppression. b. an overload of sensory memory. c. rehearsal interference. d. an LTM recency effect.
Research has shown that classical conditioning will be most effective when the conditioned stimulus:
a. is paired with another stimulus that is already an effective signal for the unconditioned stimulus b. occurs with a wide variety of other stimuli c. provides new information about the occurrence of the unconditioned stimulus d. is presented on its own, with no unconditioned stimulus