According to Piaget, 4-year-olds cannot solve a conservation-of-liquid problem because they
A) focus on the height of the water, failing to realize that changes in width compensate for the changes in height.
B) do not notice the difference in appearance between the water levels in the two glasses.
C) have limited experience with the task materials.
D) do not understand the point of the question, "Which glass holds more water?"
A
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The likelihood that help will be given to a person in need is reduced when there are many people present due to a(n) __________ of responsibility
Fill in the blank(s) with correct word
In a between-subjects experiment, if the participants in one group are noticeably older than the participants in another group, then participant age is a confounding variable and threatens the internal validity of the experiment
a. True b. False Indicate whether the statement is true or false
To investigate the effects of a new drug for hyperactivity, one group of children is given this new drug, while the other group is given a placebo. The researcher labels the drug and placebo will letter names and then has his assistant administer the pills and collect the data. Neither the research assistant nor the children will known who is getting the placebo and who is getting the new drug
until the end of the experiment. This researcher is using a a. double-blind experiment to minimize research participant bias and researcher bias. b. single-blind experiment to minimize observer bias and the observer effect. c. natural experiment that incorporates random selection and random assignment. d. placebo effect to maximize the self-fulfilling prophecy.
Maurice is never very distressed when his mother leaves him with the baby-sitter, nor does he exhibit an enthusiastic greeting when she returns. Maurice usually continues to do whatever he is doing when his mother enters the room. Ainsworth would characterize Maurice as having a(n) ________ attachment
a. secure c. ambivalent b. avoidant d. unresponsive