Research Instrument Reliability and Validity

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Questions and Answers

What does reliability of an instrument refer to?

  • The consistency of the measures or results obtained from the instrument. (correct)
  • The length of time it takes to administer the instrument.
  • The cost-effectiveness of using the instrument.
  • The accuracy of the instrument in measuring what it intends to measure.

Which type of reliability is assessed by administering the same test to the same group of respondents twice?

  • Equivalent Forms Reliability
  • Split-half Reliability
  • Test-retest Reliability (correct)
  • Internal Consistency Reliability

What is assessed when establishing equivalent forms reliability?

  • Administering two identical tests (except for wording) to the same group of respondents. (correct)
  • Testing the same person twice with a large gap in time.
  • Splitting one test into two halves and comparing the scores.
  • Administering two different tests to the different group of respondents.

Which of the following describes internal consistency reliability?

<p>The extent to which the items on a test measure the same construct. (D)</p> Signup and view all the answers

Which of the following is a method used to measure internal consistency reliability?

<p>Split-half coefficient (D)</p> Signup and view all the answers

What is the importance of a concise research instrument?

<p>To encourage respondents to read carefully and avoid guessing. (D)</p> Signup and view all the answers

Why should questions in a research instrument be presented sequentially?

<p>To enhance respondent engagement and comprehension. (D)</p> Signup and view all the answers

What does it mean for a research instrument to be valid and reliable?

<p>It ensures accuracy and appropriateness in data gathering. (A)</p> Signup and view all the answers

What is the first step a researcher should take before crafting a research instrument for quantitative research?

<p>Establish variables and research questions. (B)</p> Signup and view all the answers

Which of the following is the most common scale used in quantitative research?

<p>Likert Scale (C)</p> Signup and view all the answers

What is the primary purpose of descriptive statistical techniques in data analysis?

<p>To summarize data without showing effects or relationships. (B)</p> Signup and view all the answers

What are the key factors to consider when choosing between parametric and non-parametric tests?

<p>The scale of measurement, sample size, and data distribution. (B)</p> Signup and view all the answers

A dataset does not follow normal distribution. What type of statistical test is generally more appropriate?

<p>A non-parametric test. (B)</p> Signup and view all the answers

If a researcher is examining the relationship between two variables, what type of statistical analysis is being used?

<p>Bivariate (B)</p> Signup and view all the answers

For a study with small sample size (less than 30 per group), which type of test is generally recommended?

<p>Non-parametric tests (D)</p> Signup and view all the answers

Which sampling method involves dividing the population into subgroups or clusters?

<p>Cluster sampling (B)</p> Signup and view all the answers

What is the primary challenge that cluster sampling aims to address in large-scale studies?

<p>The population's geographical spread (B)</p> Signup and view all the answers

In cluster sampling, what characteristics should the clusters ideally possess?

<p>Homogeneous characteristics (B)</p> Signup and view all the answers

In systematic sampling, how is the interval (n) determined?

<p>By dividing the population size by the sample size (C)</p> Signup and view all the answers

What is selected at a predetermined interval in systematic sampling?

<p>Every <em>n</em>th sample (C)</p> Signup and view all the answers

If a population size is 100 and the desired sample size is 20, what is the interval in systematic sampling?

<p>5 (C)</p> Signup and view all the answers

Which of the following is a key characteristic of systematic sampling?

<p>Selection based on a predetermined interval (C)</p> Signup and view all the answers

What does a valid research instrument measure?

<p>What it is intended to measure (D)</p> Signup and view all the answers

Which of the following sampling procedures involves grouping the population into subgroups?

<p>Cluster Sampling (A)</p> Signup and view all the answers

Face validity is also known as what type of validity?

<p>Logical Validity (C)</p> Signup and view all the answers

Which type of validity is determined by experts?

<p>Content Validity (B)</p> Signup and view all the answers

What does construct validity refer to?

<p>How well the instrument aligns with other measures (C)</p> Signup and view all the answers

If an instrument produces results similar to those from existing, validated tests, what type of validity does it have?

<p>Concurrent Validity (D)</p> Signup and view all the answers

What is the primary purpose of data analysis in research?

<p>To summarize information in order to answer research questions. (C)</p> Signup and view all the answers

What should be considered when planning data analysis in quantitative research?

<p>The research problem, type of data, hypothesis, and scale used in the research instrument. (B)</p> Signup and view all the answers

In quantitative research, how is numerical data typically approached for analysis?

<p>It is analyzed into components based on research variables and questions. (C)</p> Signup and view all the answers

What does the statistical treatment in quantitative research make explicit?

<p>The different statistical methods and formulas needed to analyze the research data. (C)</p> Signup and view all the answers

When choosing statistical techniques in quantitative research, what should be considered?

<p>The purpose or objective of the research study. (A)</p> Signup and view all the answers

What is the first step in determining the sample size?

<p>Identifying the population of interest (A)</p> Signup and view all the answers

What does the term 'population' refer to in research?

<p>The objects, elements, persons, or characteristics under consideration (A)</p> Signup and view all the answers

What is the main difference between a target population and an accessible population?

<p>The researcher's ability to reach the group (B)</p> Signup and view all the answers

What does 'sampling' refer to in research?

<p>Systematic process of selecting a group from a population to be analyzed (A)</p> Signup and view all the answers

What is a 'sample' in research?

<p>A representative subset of the population (B)</p> Signup and view all the answers

Why is it important for a sample to be representative of the population?

<p>To increase the generalizability of the study findings (D)</p> Signup and view all the answers

In general, what is the relationship between sample size and accuracy of representation?

<p>The larger the sample, the more accurate the representation (A)</p> Signup and view all the answers

The sampling procedure should be aligned to what?

<p>chosen research design (D)</p> Signup and view all the answers

What is the primary characteristic of quantitative data?

<p>Appears measurable in numerical form (B)</p> Signup and view all the answers

Which data gathering technique involves gathering information using the senses?

<p>Observation (C)</p> Signup and view all the answers

What is the main method of data collection in a survey?

<p>Using interview or questionnaires (A)</p> Signup and view all the answers

In which research design is treatment or intervention used?

<p>Experimental (D)</p> Signup and view all the answers

What is the first activity in the 'Before' phase of data collection?

<p>Preparing the research instruments (A)</p> Signup and view all the answers

Which activity is part of the 'During' phase of data collection?

<p>Administering the research instrument (C)</p> Signup and view all the answers

What action is performed in the 'After' phase of data collection?

<p>Summarizing the data gathered (A)</p> Signup and view all the answers

What is the immediate next step after summarizing data during the 'After' phase?

<p>Analyzing the summarized data (B)</p> Signup and view all the answers

What is the suggested minimum sample size for an ex post facto research design?

<p>30+ (B)</p> Signup and view all the answers

What is the suggested sample size for a survey research design?

<p>800 (D)</p> Signup and view all the answers

What does statistical power refer to in research?

<p>The probability of rejecting the null hypothesis when it is false (A)</p> Signup and view all the answers

What is the ideal level of statistical power?

<p>80% (A)</p> Signup and view all the answers

What does the effect size indicate?

<p>The strength of the relationship between the independent and dependent variables (B)</p> Signup and view all the answers

In simple random sampling, what chance does each member of the population have of being selected?

<p>Equal chance (B)</p> Signup and view all the answers

What is a key characteristic of stratified random sampling?

<p>The population is divided into strata before sampling. (C)</p> Signup and view all the answers

In proportional stratified sampling, what is the first step after identifying subgroups?

<p>Divide the number of members in each subgroup by the total sample size. (A)</p> Signup and view all the answers

What is the purpose of a research design in quantitative research?

<p>To provide a framework for data collection, measurement, and analysis. (C)</p> Signup and view all the answers

Which type of quantitative research design is used when little is known about a research problem?

<p>Descriptive Research (A)</p> Signup and view all the answers

What is the main goal of correlational research?

<p>To determine the relationship between variables. (A)</p> Signup and view all the answers

Which research design is used when the researcher lacks control over the variables?

<p>Ex post facto research (D)</p> Signup and view all the answers

In which type of research design are participants assigned to pre-existing groups, limiting the conclusions that can be drawn?

<p>Quasi-experimental research (D)</p> Signup and view all the answers

Which research design is considered a 'true' experimental design?

<p>Experimental Research (A)</p> Signup and view all the answers

Which quantitative research design focuses on observing and recording a phenomenon as it occurs?

<p>Descriptive (D)</p> Signup and view all the answers

Which type of research design attempts to establish a causal link between variables, but lacks random assignment?

<p>Quasi-Experimental Research (C)</p> Signup and view all the answers

Flashcards

Reliability

The consistency of measures or results from an instrument.

Test-retest Reliability

Consistency measured by giving the same test twice to the same group.

Equivalent Forms Reliability

Reliability determined by administering two similar tests to the same group.

Internal Consistency Reliability

Measures how well items in a test measure the same concept.

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Methods for Internal Consistency

Measured using split-half, Cronbach's alpha, and Kuder-Richardson.

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Data Analysis Planning

Choosing statistical tests for research data analysis.

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Descriptive Statistical Techniques

Summarize data without revealing variable relationships.

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Parametric Tests

Statistical tests assuming data follows a normal distribution.

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Non-Parametric Tests

Statistical tests used when data doesn't meet parametric assumptions.

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Scale of Measurement

Categorizes data as interval/ratio or ordinal/nominal.

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Concise Research Instrument

An instrument that avoids excessive length to reduce respondent guessing.

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Sequential Questioning

Presenting questions in a logical order, from simple to complex, to improve comprehension.

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Validity and Reliability

Tests to ensure an instrument accurately gathers information appropriately.

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Ways to Develop Instruments

Methods include adopting, modifying, or creating new instruments for research.

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Likert Scale

A numerical scale where respondents rate or rank statements according to set criteria.

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Data Analysis

A process to summarize gathered information to answer research questions.

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Quantitative Research

Research that collects and analyzes numerical data to answer questions.

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Statistical Treatment

Applying statistical methods and formulas to analyze research data appropriately.

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Hypothesis in Research

A proposed explanation or prediction that can be tested through analysis.

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Pearson's r

A parametric test measuring the strength and direction of the relationship between two variables.

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Cluster Sampling

A sampling method involving grouping a population into clusters to simplify data collection.

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Purpose of Cluster Sampling

Used in large studies where geographical spread makes sampling difficult.

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Selection of Clusters

Clusters are selected based on homogenous characteristics from the population.

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Example of Cluster Sampling

Interviewing senior high school students by region, division, and district clusters.

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Systematic Sampling

A method of selecting samples by choosing every nth individual until desired size is reached.

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Finding the Interval

To determine interval in systematic sampling, divide population size by sample size.

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Efficiency of Systematic Sampling

Allows for quick selection from lists, especially in large populations.

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Cluster vs Systematic Sampling

Cluster sampling uses groups, while systematic sampling uses intervals for selection.

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Semantic Differential

A scale using bipolar adjectives for rating responses.

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Validity

The extent to which a research instrument measures what it intends to measure.

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Face Validity

A preliminary assessment of whether an instrument appears valid at first glance.

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Content Validity

How well the instrument meets the study's objectives and elicits necessary information.

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Construct Validity

Validity of the instrument in relation to theoretical constructs of the study.

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Sampling Procedure

The systematic method of selecting a subset from a population for research.

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Population

The totality of elements, objects, or individuals relevant to a study.

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Sample

A representative subset of the population selected for analysis.

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Target Population

The specific group of individuals the research aims to study.

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Accessible Population

The part of the target population that researchers can realistically reach.

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Representative Sample

A sample that accurately reflects the characteristics of the population.

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Sample Size

The number of subjects chosen from a population for analysis.

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Generalizability

The extent to which findings from a sample can apply to the larger population.

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Quantitative Data

Data that can be measured numerically for analysis.

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Observation Technique

Collecting information by directly seeing or hearing conditions.

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Survey Method

Data gathering through questionnaires or interviews.

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Experiment Design

A research method involving treatment and measuring effects post-intervention.

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Before Phase Activities

Preparations made prior to data collection, like instrument setup and permissions.

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During Phase Activities

Actions taken while collecting data, such as administering instruments and instructions.

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After Phase Activities

Post-collection processes including summarizing and analyzing the data collected.

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Qualitative Data in Quantitative Research

Qualitative data that is transformed into numerical values for analysis.

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Sample Size for Survey

The recommended number of participants for surveys is 800.

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Sample Size for Correlational Research

For correlational studies, the suggested sample size ranges from 100 to 200 participants.

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Sample Size for Experimental Research

Experimental designs typically require 30 or more participants.

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Statistical Power

Statistical power is the probability of correctly rejecting the null hypothesis; ideally, it is 80%.

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Effect Size

Effect size indicates the strength of the relationship between dependent and independent variables.

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Simple Random Sampling

A sampling method where every member has an equal chance of selection.

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Stratified Random Sampling

Population divided into strata before random sampling occurs, improving representation.

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Proportional Stratified Sampling

Sampling based on the proportionate distribution of subgroups in the population.

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Quantitative Research Designs

Blueprints for collecting and analyzing numerical data in research.

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Descriptive Research

Research that focuses on describing characteristics of a phenomenon.

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Correlational Research

Study assessing the relationship between two variables without implying causation.

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Ex Post Facto Research

Examines effects to infer possible causes without controlling variables.

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Quasi-Experimental Research

Research that measures causal relationships with non-random group assignments.

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Experimental Research

A structured approach using controls to establish cause and effect.

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Research Design Framework

A systematic strategy integrating parts of a research study for clarity.

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Numerical Analysis

Evaluating data through numerical methods to reveal insights.

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Study Notes

Reliability of Instrument

  • Reliability refers to the consistency of the measures or results of the instrument.
  • Test-retest Reliability: Achieved by giving the same test to the same group of respondents twice. The consistency of the two scores will be checked.
  • Equivalent Forms Reliability: Established by administering two identical tests except for wordings to the same group of respondents.
  • Internal Consistency Reliability: Determines how well the items measure the same construct. It is reasonable that when a respondent gets a high score in one item, he will also get one in similar items. There are three ways to measure the internal consistency; through the split-half coefficient, Cronbach's alpha, and Kuder-Richardson formula.

Activity 1: Qualify and Rate the Instrument

  • Directions: Look for sample research instruments from previously conducted research. Rate it on a scale of 1 to 5 (1 = lowest, 5 = highest) based on the criteria given. Then justify your rating.
  • Sample Instrument: provide a title of the instrument if possible
  • Purpose of the Research
  • Number of Items
  • Criteria for Evaluation of Instrument
    • Concise
    • Sequential
    • Valid and Reliable
    • Easily Tabulated

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