PSYC 3500 Quiz - Practice Materials PDF

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PSY 3500

Name: _________________________ Check Your Understanding Quiz 6

1. Raquelle wants to know whether the popularity of beverages at her coffee shop is related to the amount of sugar in each. To find evidence relevant to this association hypothesis, she has 400 customers rate how much they like each of 30 beverages (chai tea, kombucha, black coffee, latte, etc.). She uses this information to rank the overall popularity of beverages across customers. She also calculates the grams of sugar in each beverage. Which of the following best describes her beverage popularity scale?

a. ordinal b. self-report c. categorical d. interval

2. Which of the following reasons make multivariate correlational designs superior to bivariate correlational designs with respect to internal validity of an association claim? Select all that apply. a. They can account for third variables that are measured. b. They establish covariance. c. They need fewer subjects. d. They avoid the need for temporal precedence.

PSY 3500

Name: _________________________

Questions 3-6 refer to the following study. Dr. Farah is an educational psychologist who is interested in studying the potential causal relationship between doing homework and academic achievement. In January, Dr. Farah has her students report their fall GPA (a measure of academic achievement) and estimate how many hours they spent doing homework during a typical week in the fall semester. In May, Dr. Farah measures the same variables again (the estimated number of hours spent doing homework during a typical week in the spring semester and their spring GPA). She finds the following correlations….

Correlation Variable A

Variable B Coefficient

Correlation 1

Fall number of hours of homework

Fall semester GPA

.83*

Correlation 2

Fall number of hours of homework

Spring number of hours of

.36*

homework Correlation 3

Fall number of hours of homework

Spring semester GPA

.69*

Correlation 4

Fall semester GPA

Spring number of hours of

.18

homework Correlation 5

Fall semester GPA

Spring semester GPA

.45*

Correlation 6

Spring number of hours of

Spring semester GPA

.80*

homework *Indicates a statistically significant relationship.

3. Which of the correlations are autocorrelations?

4. Correlation 4 is an example of which of the following types of correlations?

PSY 3500

Name: _________________________

a. Reverse correlation b. Multivariate correlation c. Cross-sectional correlation d. Cross-lag correlation 5. Based on her pattern of correlations, which of the following can Dr. Farah safely conclude? a. Because Correlation 3 is significant but Correlation 4 is not, Dr. Farah has evidence that increased time on homework precedes academic achievement in the causal chain. b. Because not all the correlations are significant, Dr. Farah has no evidence that increased homework precedes academic achievement in the causal chain. c. Because Correlations 2 and 3 are significant, Dr. Farah has evidence that increased homework precedes academic achievement in the causal chain. d. Because Correlation 4 is stronger than Correlation 5, Dr. Farah has no evidence that increased homework precedes academic achievement in the causal chain.

6. Imagine that Dr. Farah noted a cyclical, reinforcing relationship between homework and academic achievement. For this to be case, which of the following correlations would need to be significant? a. Correlations 1 and 6 b. Correlations 2 and 5 c. Correlations 3 and 4 d. Correlations 2 and 3...