You would be more likely to help someone who appears to be hurt if you were by yourself than if you were surrounded by strangers. Which of the following is the probable explanation?

Both self-concept and self-esteem become more complex during middle childhood.

a. true b. false

Sandy Sue was participating in an experiment in which she was given a pill that was supposed to cause her to get drowsy. Five minutes after taking the pill, Sandy Sue reported that she felt drowsy and wanted to lie down

The pill was actually made of sugar and had no ingredients to cause drowsiness. How do you explain Sandy Sue's drowsy feeling? a) experimenter effect b) placebo effect c) subject bias d) treatment effect