Q4_W4 PR 2
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Types of Quantitative Data Collection
Overview of various methods used in quantitative research.
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Survey Research
Use of standardized questionnaires or interviews to gather data.
Systematic collection of information about people's thoughts, preferences, and behaviors.
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Importance of Survey Research in Quantitative Research
Essential for measuring unobservable data such as preferences, traits, attitudes, beliefs, behaviors, and factual information.
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Strengths of Survey Research:
Effectively measures unobservable data.
Ideal for collecting data from large populations remotely.
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Benefits of Survey Research:
Respondents can answer at their convenience; preferred format for many.
Interviews may be necessary for hard-to-reach populations.
Large surveys can detect small effects even with multiple variables.
Cost-efficient in terms of research time and resources.
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ChatGPT Teaching Assistant Student Perception Survey
Instructions for respondents to rate their agreement on statements based on their experience with ChatGPT.
Examples of statements related to the effectiveness and utility of ChatGPT in teaching programming concepts.
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Experiment
One of the most rigorous research designs.
Best suited for explanatory research examining cause-effect relationships.
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Three Key Features of Experiments
Manipulation of one or more independent variables.
Random assignment of subjects to treatment levels.
Observation of treatment effects on dependent variables.
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Basic Concepts in Experimental Research
Random selection and assignment to ensure similar treatment groups.
Treatment manipulation as the main tool for cause-effect relationships.
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Treatment and Control Groups
Subjects in treatment groups receive one or more experimental stimuli.
Success measured by favorable outcomes compared to control group subjects.
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Example of Drug Testing
Groups:
High dosage, low dosage, placebo.
Effectiveness evaluated by improvement in treatment group compared to control.
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Placebo Effect
Positive response to a non-active treatment.
Variations in format (e.g., surgery, injections, pills).
Nocebo effect: negative responses to inactive ingredients.
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Amplifying Treatment Benefits
Enhance the placebo effect through enthusiasm, communication skills, and reputation.
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Treatment Manipulation
Key to controlling for cause in experimental research.
Utilizes pretests (before treatment) and posttests (after treatment) to measure effectiveness.
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Random Selection and Assignment
Ensures a positive chance for selection; critical for maintaining internal validity.
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Structured Interview
Standardized interview schedule administered by trained interviewers.
Questions are specific and typically include fixed range answers.
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Self-Completion Questionnaire
Also known as self-administered questionnaire, contains fewer open-ended questions.
Completed directly by respondents.
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Designing a Self-Completion Questionnaire
Ensure clear presentation and easy navigation.
Provide clear instructions and maintain coherence in questions.
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Content Analysis
A method of document and text analysis that quantifies content using predetermined categories in a systematic manner.
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