Q: A researcher wants to test whether a new therapy improves memory scores compared to no therapy. Which is the most appropriate alternative hypothesis ($$H_a$$)?

$$\mu_{therapy} \neq \mu_{no\ therapy}$$

Question 1

Which of the following best describes a null hypothesis ($$H_0) in $$psychological research?

Accepted Answer

It always uses an equal sign ($$=) $$and states there is no effect or no difference.

Question 2

A researcher wants to test whether a new therapy improves memory scores compared to no therapy. Which is the most appropriate alternative hypothesis ($$H_a$$)?

Accepted Answer

$$\mu_{therapy} 
eq \mu_{no\ therapy}$$

Question 3

Which scenario best illustrates the use of a two-tailed test?

Accepted Answer

Testing if there is any difference in anxiety levels between males and females.

Question 4

In a study examining the effect of sleep duration (4, 6, 8 hours) on test performance, how many levels does the independent variable have?

Accepted Answer

3

Question 5

Which of the following is the dependent variable in an experiment measuring the impact of therapy type (CBT, medication, control) on anxiety?

Accepted Answer

Anxiety score

Question 6

A psychologist wants to know if males and females differ in their average memory scores. Which statistical test should be used?

Accepted Answer

Two-tailed test

Question 7

If a researcher writes the hypothesis $$H_a: \mu_{A} \u003e \mu_{B}$$, what type of test are they planning to use?

Accepted Answer

One-tailed test

Question 8

Which statement about independent and dependent variables is correct?

Accepted Answer

The independent variable is what you manipulate; the dependent variable is what you measure.

Question 9

A study compares test scores across three different teaching methods. What is the correct way to count the levels of the independent variable?

Accepted Answer

Count the number of teaching methods.

Question 10

Which of the following is a quick tip for identifying the independent variable in an experiment?

Accepted Answer

It is what you change or manipulate.

Question 11

A researcher hypothesizes that sleep deprivation will decrease memory performance. Which is the correct null hypothesis ($$H_0$$)?

Accepted Answer

$$\mu_{deprived} = \mu_{rested}$$

Question 12

In an experiment, the researcher manipulates the amount of sleep (4, 6, 8 hours) and measures test performance. Which is the independent variable?

Accepted Answer

Amount of sleep

Question 13

If a study uses three therapy types (CBT, medication, control) and two genders (male, female), how many total conditions are there?

Accepted Answer

6

Question 14

Which of the following hypotheses is appropriate for a two-tailed test?

Accepted Answer

$$H_a: \mu_1$ 
eq \mu_2$

Question 15

A researcher is interested in whether therapy type affects anxiety scores. What is the dependent variable?

Accepted Answer

Anxiety score

Question 16

Which of the following is NOT a correct quick tip from the study guide?

Accepted Answer

IV is what you measure.

Question 17

A study compares memory scores between participants who slept 4, 6, or 8 hours. What is the null hypothesis ($$H_0) $$for this study?

Accepted Answer

$$\mu_{4hr} = \mu_{6hr} = \mu_{8hr}$$

Question 18

Which of the following best describes a one-tailed test?

Accepted Answer

It looks for a difference in only one direction, using $$.

Question 19

A researcher wants to compare anxiety scores between three therapy types and two genders. How many levels does the independent variable 'therapy type' have?

Accepted Answer

3

Question 20

Which of the following is a correct application of the formula for counting levels of the independent variable?

Accepted Answer

Number of levels = number of conditions/groups.

Psychology Research Methods – Study Guide

Guida di studio - Domande di pratica

Study guide - Flashcard