Understanding Variables in Research Studies

What is the main focus of this lesson?

• Studying the effects of therapy dogs

• Identifying variables and their levels in research studies

• Understanding the history of research methods

• Learning about famous psychologists

In the first example, what is the causal variable?

• Memory loss

• Neurodegenerative disorder

• Famous faces recall

• Decades of events

What are the levels of the causal variable in the first example?

• Alzheimer's and Huntington's diseases

• 1940s and 1980s

• Number of correctly identified items

• Patients and psychologists

In the second example, what is the outcome variable?

• Eighth grade class size

• Regular math curriculum

• Algebra program participation

• Standardized math assessment score

What are the levels of the causal variable in the second example?

• Eighth or ninth grade

• Standardized or non-standardized tests

• Completing or not completing the algebra program

• High or low math grades

In the third example, what is the causal variable?

• Weekly therapy sessions

• Therapy dogs

• Medication for depression

• Nursing home location

What is the outcome variable in the third example?

• Patient satisfaction

• Weekly therapy sessions

• Number of therapy dogs

• Proportion of patients taking medication for depression

What are the levels of the outcome variable in the third example?

• High and low depression rates

• Before and after dog therapy

• Weekly and monthly sessions

• 30% and 15% medication usage

How is depression measured in the third example?

• Proportion of patients taking medication

• Number of therapy sessions

• Therapist observations

• Patient interviews

What is the purpose of identifying variables and their levels in research studies?

• To increase student participation in algebra

• To understand the relationship between different factors

• To memorize historical events

• To improve therapy dog training