IB Psychology HL : Simple experimental study
Study concepts, example questions & explanations for IB Psychology HL
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Example Questions
Example Question #1 : Simple Experimental Study
What is the main benefit of choosing a large sample for a study (as opposed to a smaller one)?
It is less costly
It is more likely to be representative of the population
It is less time consuming
It is guaranteed to be representative of the population
It is less difficult to coordinate
It is more likely to be representative of the population
The ideal sample that is chosen out of a population is a representative sample, which means that the makeup of the sample generally matches the makeup of the population. The main benefit of choosing a larger sample is that it is more likely to be representative of the population; however, unless the sample includes the entire population (which it rarely, rarely does), it does not guarantee that it will be representative. However, larger samples are often more time consuming, harder to coordinate, and more costly, so those drawbacks have to be balanced.
Example Question #2 : Simple Experimental Study
A researcher is curious about how temperature relates to aggression and predicts that as the temperature in a room increases, a measure of the subject's aggression will increase as well. What is the experimental design term for "aggression" in this scenario?
Hypothesis
Dependent variable
None of these
Independent variable
Theory
Dependent variable
A variable is described something that varies between people or objects—in this case, temperature and aggression are the variables. The “independent variable” (IV) is the variable that is manipulated by the researcher (temperature) and the “dependent variable” (DV) is the variable that changes as a result of a change in the IV (aggression). A “hypothesis” describes the relationship between variables and is generally what the researcher predicts will happen (i.e. “as the temperature in a room increases, a measure of the subject's aggression will increase as well”). Last, a “theory” is a principle or set of principles that explains a phenomenon.
Example Question #3 : Simple Experimental Study
What is the main benefit of choosing a large sample for a study (as opposed to a smaller one)?
It is more likely to be representative of the population
It is guaranteed to be representative of the population
It is less costly
It is less time consuming
It is less difficult to coordinate
It is more likely to be representative of the population
The ideal sample that is chosen out of a population is a representative sample, which means that the makeup of the sample generally matches the makeup of the population. The main benefit of choosing a larger sample is that it is more likely to be representative of the population; however, unless the sample includes the entire population (which it rarely, rarely does), it does not guarantee that it will be representative. However, larger samples are often more time consuming, harder to coordinate, and more costly, so those drawbacks have to be balanced.
Example Question #4 : Simple Experimental Study
Which of the following best describes the difference between basic and applied psychological research?
Applied research is more theoretical while basic research is more practical
Basic research is more theoretical while applied research is more practical
Basic research is used for simple problems while applied research is used for complex problems
Basic research is more biological while applied research is more philosophical
Basic research is used for complex problems while applied research is used for simple problems
Basic research is more theoretical while applied research is more practical
The distinction between basic and applied research does not have to do with the difficulty of the problem or to which branch of psychology it relates. Basic research is more theoretical and focused on understanding a phenomenon, whereas applied research is more focused on solving a real-world problem.
Example Question #5 : Simple Experimental Study
Which of the following best describes the difference between basic and applied psychological research?
Basic research is used for complex problems while applied research is used for simple problems
Basic research is more theoretical while applied research is more practical
Applied research is more theoretical while basic research is more practical
Basic research is used for simple problems while applied research is used for complex problems
Basic research is more biological while applied research is more philosophical
Basic research is more theoretical while applied research is more practical
The distinction between basic and applied research does not have to do with the difficulty of the problem or to which branch of psychology it relates. Basic research is more theoretical and focused on understanding a phenomenon, whereas applied research is more focused on solving a real-world problem.
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