Exam 23: Evaluating Research Validity: Part I

Descriptive questions only have one independent variable.

Randomized experimental studies include:

What question does measurement validity address?

Typically, the number of levels of a randomized experimental approach or a comparative approach is five or more.

Internal consistency is similar to parallel forms reliability.

A form of measurement reliability which measures consistency or stability refers to participants' scores being the same or similar from one testing to another testing.

A comparison question which is comparing randomly assigned participants to groups is usually high on measures of internal validity.

Robert Rosenthal did a series of studies in which he carefully manipulated teachers' expectations of students; he did this by labeling children in different ways. The main concern in a controlled study of this sort is with:

Comparative studies include which of the following:

A parallel forms reliability of .55 is acceptable.

Associational questions usually have two variables with five or more levels.

What does internal validity tell us?

One key to the comparative approach is that the independent variable is active.

A researcher was interested in studying stress as it related to academic performance incalculus. She also believed that humor reduced stress and might increase academicperformance. She had two classes one hour apart, one at 8 a.m. and one at 10 a.m. onMonday, Wednesday, and Friday. The students self selected into the classes. The researchercollected baseline stress data at the beginning of the semester. In one class she utilized humoron a daily bases and was sure to provide the class with at least one scripted joke or shorthumorous video per day. In the other class, she taught the students as normal with littlehumor, no scripted jokes, and no funny videos. On the day of the midterm, she measuredtheir stress levels before giving the calculus exam. She gave each class the same calculus testand recorded their achievements levels on the exams. Stress was measured using a 10question instrument which summated the 10 questions into one stress construct. Theinstrument had been around for decades and had high reliability and validity measures. -For the stress/humor scenario what are two independent variables?

The definition of ordinal includes:

It is acceptable to have a negative .55 reliability measure.

Which of the following is not a type of reliability?

A researcher was interested in studying stress as it related to academic performance incalculus. She also believed that humor reduced stress and might increase academicperformance. She had two classes one hour apart, one at 8 a.m. and one at 10 a.m. onMonday, Wednesday, and Friday. The students self selected into the classes. The researchercollected baseline stress data at the beginning of the semester. In one class she utilized humoron a daily bases and was sure to provide the class with at least one scripted joke or shorthumorous video per day. In the other class, she taught the students as normal with littlehumor, no scripted jokes, and no funny videos. On the day of the midterm, she measuredtheir stress levels before giving the calculus exam. She gave each class the same calculus testand recorded their achievements levels on the exams. Stress was measured using a 10question instrument which summated the 10 questions into one stress construct. Theinstrument had been around for decades and had high reliability and validity measures. -In the stress/humor scenario day of the week (Monday, Wednesday, or Friday) is which of the following?

A researcher was interested in studying stress as it related to academic performance incalculus. She also believed that humor reduced stress and might increase academicperformance. She had two classes one hour apart, one at 8 a.m. and one at 10 a.m. onMonday, Wednesday, and Friday. The students self selected into the classes. The researchercollected baseline stress data at the beginning of the semester. In one class she utilized humoron a daily bases and was sure to provide the class with at least one scripted joke or shorthumorous video per day. In the other class, she taught the students as normal with littlehumor, no scripted jokes, and no funny videos. On the day of the midterm, she measuredtheir stress levels before giving the calculus exam. She gave each class the same calculus testand recorded their achievements levels on the exams. Stress was measured using a 10question instrument which summated the 10 questions into one stress construct. Theinstrument had been around for decades and had high reliability and validity measures. -For the stress/humor scenario which of the following would be true?

It is acceptable to have a negative .55 discriminate validity measure.