Which variable in an experiment is manipulated by the researcher quizlet?

Which variable in an experiment is manipulated by the researcher quizlet?

Variable manipulated by the researcher; presumably, this manipulation, or variation, is the cause of change in the dependent variable; also referred to as antecedent variable, experimental variable, treatment variable and causal variable.

Which experimental design provides the best defense against the threats to internal validity?

The true experiment is considered to offer the greatest protection against threats to internal validity. Note in this discussion that pre- and post-tests are the same test, although question order is normally changed.

What is the threat to internal validity which is largely overcome by using random assignment of participants to experimental and control groups?

Which threat to internal validity is largely overcome by using random assignment of participants to experimental and control groups? correct answer: Selection 6.In the study of bystanders and thieves presented in the text, participants are invited to a store where they see someone steal the purse of another customer.

Are valid tests always valid?

A test is valid if it measures what it is supposed to measure. If theresults of the personality test claimed that a very shy person was in factoutgoing, the test would be invalid. Reliability and validity are independent of each other. A measurement maybe valid but not reliable, or reliable but not valid.

What are the three measures of a test’s reliability?

Reliability refers to the consistency of a measure. Psychologists consider three types of consistency: over time (test-retest reliability), across items (internal consistency), and across different researchers (inter-rater reliability).

What are the two most widely used IQ tests?

The most widely used intelligence tests include the Stanford-Binet Intelligence Scale and the Wechsler scales. The Stanford-Binet is the American adaptation of the original French Binet-Simon intelligence test; it was first introduced in 1916 by Lewis Terman, a psychologist at Stanford University.

Why is my Cronbach alpha low?

A low value of alpha could be due to a low number of questions, poor inter-relatedness between items or heterogeneous constructs. For example if a low alpha is due to poor correlation between items then some should be revised or discarded.

What Cronbach alpha is acceptable?

The general rule of thumb is that a Cronbach’s alpha of . 70 and above is good, . 80 and above is better, and . 90 and above is best.

Begin typing your search term above and press enter to search. Press ESC to cancel.

Back To Top