## PSYC 354 Homework 1

Fill in the blank with the appropriate word or words.

1. A researcher counts the number of times per half hour that a child shares a toy. This variable (number of times sharing) is at the ________ level of measurement.

2. A psychologist divides different learning styles into 3 categories, or types. The variable “learning style” is a variable at the ________ level of measurement.

3. When describing interval and ratio variables, people often group them together into a more general type of variable. The name for this more general kind of variable is a __________ variable.

4. The ____________ is the large group about which you want to know something

5. A(n) ________ is a set of observations drawn from the larger group of interest.

6. A statistic that uses sample data to make general estimates about the larger population is a(n) ________ statistic.

7. A(n) ________ statistic is one which summarizes a group of numbers.

8. A scientist is in the process of drawing conclusions about whether or not a particular relation between variables is supported by the data. The name for this process is ________.

9. A variable that is manipulated to determine its effects on another variable is a(n) ________ variable.

10. A(n) ________ variable makes it impossible to determine whether the independent variable is the cause of changes in the dependent variable.

11. When each participant has the same chance of being assigned to the various levels of the manipulation, they are said to be ______________ to conditions.

12. A(n) ___________ relies on random assignment of participants to conditions so that cause and effect can be discovered.

13. Participants in a sleep study are divided into three groups: normal sleep, interrupted sleep, and sleep deprivation. Each participant only experiences the level to which they are assigned. This is an example of a(n) ________-subjects design.

14. In another sleep study, participants experience all three sleep conditions over time. This is an example of a(n) ________-subjects design.

15. Briefly explain what a “level” is in relation to independent variables: ________________________________________________________________________________________________________________________________________________

Answer the following questions:

Question 1a-1c

A clinical psychologist decides to study the effects of treatment type (cognitive behavioral, psychodynamic, and interpersonal) on depression symptoms.

1-a) What would the dependent variable be in this study?

Answer

1-b) What would the independent variable be in this study?

Answer

1-c) How many levels would the independent variable have?

Answer

Question 2 (a-d)

A psychologist reported the results of a study in which 200 female college students with OCD completed an anxiety symptoms scale with scores ranging from 0 to 30. On average, the female college students scored 17. Identify each of the following for this study.

2-a) Population

Answer

2-b) Sample

Answer

2-c) Dependent variable

Answer

2-d) Descriptive statistic

Answer

Questions 3-6

Answer these general SPSS questions.

3) In which window do you enter data in SPSS?

Answer

4) Which window displays the results of your analysis in SPSS?

Answer

5) Which SPSS main menu would you use to choose a particular statistical test?

Answer

6) In the Data View, each _____ represents one participant’s information.

Answer

Question 7a-7b

Suppose you have a data set in which the variable “Gender” is coded in the file as numbers (1 and 2). However, you want the words “male” and “female” to show up in the output when you run your test.

7a) Which dialog box is used to create labels such as male and female for specific numbers in the data set? (Give the title at the top of the box.)

Answer

7b) If you want to define the level of measurement for the variable “Gender,” which column within Variable View allows you to do this?

Answer

Submit Homework 1 by 11:59 p.m. (ET) on Monday of Module/Week 1. Remember to name file appropriately.