Research Study Design Concepts

The video explains the differences between observational studies and experiments, highlighting key terms like variables and factors. Observational studies involve observing subjects without manipulation, while experiments involve manipulating factors to determine causality. The video also discusses types of observational studies, such as retrospective and prospective, and provides examples to illustrate the concepts. It concludes with a summary of the key points, emphasizing that experiments can prove cause and effect, unlike observational studies.

What is the term used for the people chosen to be examined in a study?

• Experimental Units

• Subjects or Participants

• Factors

• Variables

In an observational study, what is the role of the researcher regarding the variables?

• Manipulate the variables

• Observe without manipulation

• Ensure causality

• Assign factors to participants

What is a key limitation of observational studies?

• They always involve human subjects

• They require a large number of participants

• They cannot determine causality

• They are expensive to conduct

In an experiment, what is the purpose of manipulating factors?

• To observe natural behavior

• To determine causality

• To collect retrospective data

• To avoid lurking variables

What distinguishes a retrospective study from a prospective study?

• Retrospective studies collect data from the past

• Prospective studies do not involve human subjects

• Prospective studies manipulate variables

• Retrospective studies are more accurate

In a prospective study, how is data collected?

• Through random assignments

• By manipulating variables

• As events unfold

• From historical records

Which of the following is an example of an experiment?

• Assigning specific library hours to students

• Surveying people's singing habits

• Observing students' library usage

• Collecting past data on medication use

What is the main goal of conducting experiments?

• To avoid ethical concerns

• To prove cause and effect

• To observe natural behavior

• To collect large datasets

How can researchers ensure causality in a study?

• By observing without interference

• By collecting retrospective data

• By manipulating explanatory variables

• By using only human subjects

What is a factor in the context of experiments?

• A lurking variable

• A participant in the study

• An explanatory variable that is manipulated

• A type of observational study