Shoppers-Naturalistic Observation
Market researchers have recently begun observing people shopping for new cars, using products such as laundry detergents, or eating ice cream at home. These researchers may ask permission to snoop in people's refrigerators or closets to see what things they contain. List some advantages and disadvantages that this type of res ...continues
Experimental Design is overviewed.
Advantages and disadvantages of between subjects and within-subjects experimental designs are shown.
In an experiment designed to examine the effects of dieting and exercise on weight loss, subjects were randomly assigned to one of four conditions: (1) both dieting and exercise, (2) dieting but no exercise, (3) exercise but no dieting, and (4) neither dieting nor exercise. Results indicated that subjects not on a diet lost only ...continues
An educational psychologist is asked to conduct a study to determine if class size has an effect on academic achievement. The psychologist identifies a large fifth-grade classroom in one inner-city school and a small fifth-grade classroom in another inner-city school. Principals from each school agree to participate in the study ...continues
Sources of Validity are noted.
An educational psychologist is asked to conduct a study to determine if class size has an effect on academic achievement. The psychologist identifies a large fifth-grade classroom in one inner-city school and a small fifth-grade classroom in another inner-city school. Principals from each school agree to participate in the study ...continues
In a line graph of results of a 2x2 factorial experiment, an interaction is shown by: a) some points higher than others b) one line higher than another c) two lines not parallel to the x axis d) two lines not parallel to each other In a mixed design, a) there is one independent variable and one dependant variable b) one ...continues
After 5 weeks of voluntary wheel running…mice (of a certain strain) were significantly resistant to the sleep inducing effects of (alcohol). Sixty-four mice, 32 males and 32 females, were assigned to wheel (free access to a running wheel in the home cage) or no-wheel conditions. At the end of the training period, the animals wer ...continues
Internal validity and external validity of an experiment are contrasted.
I distinguish between internal validity and external validity of an experiment.
Single-subject research design is examined briefly.
The most basic single-subject research design is composed of the following phases:_______________________________________________________ The essential feature of this design that allows one to infer casual relationship is _____________________________________________________________ . These questions are discussed.
Researcher “Jack” is interested in how self-esteem affects willpower when dieting. He finds 20 students (10 Male, 10 Female) who agree to come to his lab one at a time for a study. The lab is stocked with a variety of snack foods. When they arrive, he gives them an unsolvable logic problem to work on. He then secretly flips a co ...continues
