Psych 101: Introductory Psychology Lab

Mid-Term Preparation

Dr. X. Periment has heard antcedotal evidence that students that have coffee while studying will learn better, and decides to adopt this hypothesis to investigate study habits of college students. He develops an experiment where 50 of the 100 students drink coffee while reading a chapter of a European History textbook. The next day, he gives a multiple choice test on the information presented in the chapter.

The __________ is the different scores on the History test.

  1. independent variable
  2. dependent variable
  3. controlled variable
  4. counfounding variable

The __________ is the amount of coffee given to subjects, relative to their body mass.

  1. independent variable
  2. dependent variable
  3. controlled variable
  4. counfounding variable

The ___________ is whether students drank coffee while reading the European History textbook.

  1. independent variable
  2. dependent variable
  3. controlled variable
  4. counfounding variable

The ___________ is whether students ate breakfast on the test day.

  1. independent variable
  2. dependent variable
  3. controlled variable
  4. counfounding variable

The experimental design used in this experiment is ___________.

  1. counterbalanced presentation of conditions
  2. within-subjects
  3. between-subjects
  4. double-blind

To determine if there are statisically significant results in Dr. X Periment's study, he should use the ____________ test.

  1. Mann-Whitney U
  2. Pearson's correlational
  3. Sign
  4. Parametric

Identify the implication(s) for the following statement: Statistical significance was demonstrated at the 5% error level.

  1. The null hypothesis should be accepted.
  2. Five percent of the data collected is subject to random error, which cannot be controlled.
  3. The mean of one group is 5% larger than the mean of the other group.
  4. The differences between the groups were so large, if we did the same experiment 100 times, 95 of them would yield similar results.

In a well designed experiment, the _______ variable measures effects of the ________ variable.

  1. dependent; controlled
  2. independent; confounding
  3. independent; controlled
  4. dependent; independent

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Last update: 23 June 1998