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Treatment
In psychological research, a treatment is defined as any intervention intended to change people's behavior for the better. This broad concept encompasses medical treatments and psychotherapies for psychological disorders, as well as various interventions designed to reduce prejudice, promote conservation, or improve learning.
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Research Methods in Psychology - 4th American Edition @ KPU
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Example of an Experiment: Note-Taking Method and Learning Performance
Functional Relationship Between Independent and Dependent Variables
A researcher conducts a study to determine if the amount of sleep affects problem-solving skills. One group of participants is allowed to sleep for eight hours, while a second group is only allowed to sleep for four hours. The next morning, both groups are given the same set of puzzles to solve, and the researcher records how many puzzles each participant completes correctly. In this study, what is the independent variable?
Identifying Experimental Variables
Extraneous Variable
Treatment
Non-Experimental Research
Non-Manipulated Independent Variable
Operational Definition
Experimental Manipulation
Experimental Condition
Internal Validity
Manipulation Check
Null Result
In an experimental research study, how is an independent variable defined?
A researcher conducts an experiment to determine if a new cognitive exercise improves memory retention. They have one group practice the exercise daily while a second group does not, and then they measure both groups' memory test scores. In this study, the memory test scores represent the independent variable.
Match each psychology study description to the specific factor that serves as the independent variable in that research scenario.
A researcher is investigating how anxiety affects cognitive performance. Arrange the following methods of operationalizing the Independent Variable (IV) from the approach that provides the highest degree of internal validity (strongest causal evidence) to the approach that provides the lowest degree.
In a factorial research design investigating how both lighting conditions (bright vs. dim) and participant age (young vs. old) affect visual search speed, a researcher classifies both 'lighting' and 'age' as _____ variables because they are both hypothesized to be causes of the variation in search speed.
According to the definition of experimental research, what is the role of an independent variable in a cause-and-effect relationship?
True or False: In psychological research, an independent variable must always be manipulated by the researcher and can never simply be measured.
Match each research design scenario to the correct status of its independent variable (IV) based on the study's design.
Active Manipulation in Experiments
Treatment
Experimental Condition
Manipulation Check
Null Result
In an experiment, what does it mean to manipulate an independent variable?
A researcher studying the effect of sleep deprivation on memory assigns one group of participants to sleep for 8 hours and a second group to sleep for only 4 hours, then measures both groups' recall scores. This procedure qualifies as experimental manipulation of the independent variable.
A researcher is conducting an experiment to see how different types of feedback affect student motivation. Match each action taken by the researcher to the specific component of experimental manipulation it represents.
A researcher is investigating how 'lighting intensity' affects student focus. To ensure the study utilizes a systematic change of the lighting levels across groups, the researcher must follow a specific logical structure. Arrange the following actions in the order required to correctly implement this process.
A researcher is developing a novel experiment to investigate the causal effect of 'visual complexity' on 'cognitive load'. To fulfill the requirement of experimental manipulation, which of the following original research protocols should the researcher create?
In a psychological experiment, manipulating an independent variable can only be achieved by exposing different groups of participants to different levels of that variable.
A researcher claims to have discovered a cause-and-effect relationship by comparing the focus levels of students who naturally drink coffee to those who do not. To evaluate the validity of this claim, a critic would argue that the study lacks a(n) _____ of the factor being studied. Without systematically changing which participants receive which amount of coffee, the researcher cannot rule out pre-existing differences as the true cause of the results.
Match each research scenario or experimental action to the specific aspect of experimental manipulation it applies.
A researcher measures the attention span of participants who naturally choose to drink coffee compared to those who do not. Because the researcher did not systematically change the caffeine levels, this study lacks _____, which is a fundamental requirement of an experiment.
Order the steps of designing, executing, and evaluating a study with an experimental manipulation from the first step to the final step.
Learn After
Placebo
Treatment Condition
In psychological research, how is a 'treatment' defined?
In psychological research, the term 'treatment' is restricted exclusively to medical interventions and psychotherapies designed to address clinical disorders.
Match each psychological intervention with the specific behavioral improvement it is designed to facilitate.
Arrange the logical steps a researcher follows to analyze whether a specific study component meets the psychological criteria to be labeled a 'treatment'.
Suppose you are designing a research study to reduce test anxiety in undergraduate students. Which of the following implementation plans correctly constructs a 'treatment' aimed at improving this behavioral outcome?
A researcher implements a new workplace policy solely to observe its effect on employee social networks, without any aim to increase productivity or well-being. In the context of psychological research, this intervention would not be classified as a 'treatment' because it lacks the specific _____ to change behavior for the better.
In psychological research, a(n) _____ is defined as any intervention intended to change people's behavior for the better, including psychotherapies, medical treatments, and interventions designed to improve learning or reduce prejudice.