An experiment is conducted to test the hypothesis that taking gingko supplements increases memory. Participants are randomly assigned to receive gingko or placebo pills for a month and then their memory is tested
If the gingko group's average test score is 3 points higher than the placebo group, can the researchers conclude that the results support the hypothesis? If not, what do the researchers need to do to determine if the results support the results or not?
What will be an ideal response?
Answer: A good answer will include the following key points.
? The researchers cannot determine whether the results support the hypothesis until they determine if the difference between the two groups is statistically significant or not.
? Statistical significance implies that the difference between the two groups is unlikely to have occurred by random chance alone.
? To test whether the result is statically significant, the researchers will need to use a set of procedures called a hypothesis test.
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What are the key brain regions and subsequent changes in activity implicated in mood disorders?
What will be an ideal response?
The ____________________ associates visual stimuli such as cat and Robert with the sound combinations that produce the spoken words, while the ____________________ associates the sounds of words with certain letter combinations
Fill in the blank(s) with correct word
In their work involving the visual systems of cats, Hubel and Wiesel identified individual neurons that responded to specific __________
a) angles and lines. b) feline facial features. c) ovals and circles. d) prey items.
As researchers, we usually set alpha at .05 because
What will be an ideal response?