AP Psych Experimental Design Variables
35 flashcards covering AP Psych Experimental Design Variables for the AP-PSYCHOLOGY Unit 1: Scientific Foundations section.
Experimental design variables are a fundamental concept in AP Psychology, as outlined by the College Board's curriculum framework. This topic encompasses independent, dependent, and controlled variables, which are crucial for structuring experiments in psychological research. Understanding how to manipulate and measure these variables allows researchers to draw valid conclusions about cause-and-effect relationships.
On practice exams, questions about experimental design variables often require students to identify or differentiate between these types of variables in hypothetical scenarios. A common pitfall is confusing independent and dependent variables, particularly when presented with complex experimental setups. Additionally, students may overlook the significance of control variables, which can affect the validity of their findings.
A practical tip for success is to always clearly define and label each variable in your experimental design, as this clarity can prevent misunderstandings and strengthen your overall research framework.
Terms (35)
- 01
What is the independent variable in an experiment?
The independent variable is the factor that is manipulated or changed by the researcher to observe its effects on the dependent variable. (College Board AP CED)
- 02
What is the dependent variable in an experiment?
The dependent variable is the outcome or response that is measured in an experiment, which is affected by changes in the independent variable. (College Board AP CED)
- 03
How do confounding variables affect experimental results?
Confounding variables can introduce alternative explanations for the results, making it difficult to determine whether the independent variable truly caused any observed changes in the dependent variable. (College Board AP CED)
- 04
What is a control group in experimental design?
A control group is a baseline group that does not receive the experimental treatment, allowing researchers to compare results against the experimental group. (College Board AP CED)
- 05
When designing an experiment, what is the purpose of random assignment?
Random assignment helps ensure that each participant has an equal chance of being placed in any group, which minimizes preexisting differences between groups. (College Board AP CED)
- 06
What is the difference between a laboratory experiment and a field experiment?
A laboratory experiment is conducted in a controlled environment, while a field experiment takes place in a natural setting, allowing for greater ecological validity. (College Board AP CED)
- 07
Define operational definition in the context of experimental research.
An operational definition specifies how variables are measured or manipulated in a study, providing clarity and consistency in research. (College Board AP CED)
- 08
What role does a hypothesis play in experimental design?
A hypothesis is a testable prediction about the relationship between the independent and dependent variables, guiding the research process. (College Board AP CED)
- 09
How often should experiments be replicated to ensure reliability?
Experiments should be replicated multiple times to verify results and ensure reliability, although there is no specific mandated frequency. (College Board AP CED)
- 10
What is the significance of a double-blind study?
A double-blind study prevents both participants and researchers from knowing who is in the experimental or control group, reducing bias in the results. (College Board AP CED)
- 11
In an experiment, what is a placebo?
A placebo is a substance or treatment with no therapeutic effect, used as a control to compare against the actual treatment in experiments. (College Board AP CED)
- 12
What is the purpose of using a sample in experimental research?
A sample allows researchers to draw conclusions about a larger population without needing to study every individual, making research more feasible. (College Board AP CED)
- 13
What is a longitudinal study?
A longitudinal study follows the same subjects over a period of time to observe changes and developments in the variables of interest. (College Board AP CED)
- 14
Define the term 'variable' in the context of psychological research.
A variable is any characteristic, number, or quantity that can be measured or counted, which can change or vary among subjects in a study. (College Board AP CED)
- 15
What is the role of ethics in experimental design?
Ethics in experimental design ensures that the rights and welfare of participants are protected, requiring informed consent and debriefing. (College Board AP CED)
- 16
What is a cross-sectional study?
A cross-sectional study examines different subjects at one point in time, allowing researchers to compare different groups without longitudinal tracking. (College Board AP CED)
- 17
What does it mean to operationalize a variable?
To operationalize a variable means to define it in measurable terms, specifying how it will be quantified or manipulated in a study. (College Board AP CED)
- 18
What is the purpose of using a random sample in research?
A random sample ensures that every member of the population has an equal chance of being selected, enhancing the representativeness of the sample. (College Board AP CED)
- 19
How does a researcher control for extraneous variables?
A researcher controls for extraneous variables by using techniques such as randomization, matching, or holding variables constant to minimize their impact. (College Board AP CED)
- 20
What is the difference between qualitative and quantitative research?
Qualitative research focuses on understanding concepts and experiences, while quantitative research involves numerical data and statistical analysis to draw conclusions. (College Board AP CED)
- 21
What is a within-subjects design?
A within-subjects design is an experimental design where the same participants are used in all conditions, allowing for direct comparison of effects. (College Board AP CED)
- 22
What is a between-subjects design?
A between-subjects design involves different participants being assigned to different conditions, allowing comparison between groups. (College Board AP CED)
- 23
What does it mean to have internal validity in an experiment?
Internal validity refers to the extent to which an experiment accurately establishes a causal relationship between the independent and dependent variables. (College Board AP CED)
- 24
What is external validity in the context of experimental research?
External validity is the degree to which the findings of an experiment can be generalized to other settings, populations, or times. (College Board AP CED)
- 25
What is a pilot study?
A pilot study is a small-scale preliminary study conducted to test the feasibility, time, cost, and adverse events involved in a research project. (College Board AP CED)
- 26
Define the term 'bias' in psychological research.
Bias refers to any systematic error that can affect the results of a study, leading to invalid conclusions or misinterpretations of data. (College Board AP CED)
- 27
What is the purpose of using a control variable?
A control variable is kept constant throughout an experiment to prevent it from influencing the outcome, ensuring that changes in the dependent variable are due to the independent variable. (College Board AP CED)
- 28
What does the term 'randomization' refer to in experimental design?
Randomization refers to the process of randomly assigning participants to different groups to eliminate bias and ensure that each group is comparable. (College Board AP CED)
- 29
What is the significance of the placebo effect in experiments?
The placebo effect occurs when participants experience changes due to their expectations rather than the treatment itself, highlighting the importance of control groups. (College Board AP CED)
- 30
What is a factorial design in experimental research?
A factorial design is an experimental setup that examines the effects of two or more independent variables simultaneously, allowing for interaction effects to be analyzed. (College Board AP CED)
- 31
What is meant by the term 'statistical significance'?
Statistical significance indicates that the results of an experiment are unlikely to have occurred by chance, typically assessed using a p-value. (College Board AP CED)
- 32
What is a variable's range in the context of research?
The range of a variable is the difference between the highest and lowest values observed, providing insight into the variability of the data. (College Board AP CED)
- 33
How can researchers ensure the reliability of their measures?
Researchers can ensure reliability by using consistent procedures, standardized measures, and conducting test-retest assessments to check for stability over time. (College Board AP CED)
- 34
What is the purpose of a debriefing session after an experiment?
A debriefing session provides participants with information about the study's purpose and findings, addressing any misconceptions and ensuring ethical standards are met. (College Board AP CED)
- 35
What is the role of theory in experimental design?
Theory provides a framework for generating hypotheses and guiding the research process, helping to interpret findings and contribute to scientific knowledge. (College Board AP CED)