Validity and reliability in quantitative research proposal

Since from this perspective, the purpose of qualitative research is to describe or understand the phenomena of interest from the participant's eyes, the participants are the only ones who can legitimately judge the credibility of the results.

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Transferability Transferability refers to the degree to which the results of qualitative research can be generalized or transferred to other contexts or settings. From a qualitative perspective transferability is primarily the responsibility of the one doing the generalizing.

The qualitative researcher can enhance transferability by doing a thorough job of describing the research context and the assumptions that were central to the research. The person who wishes to "transfer" the results to a different context is then responsible for making the judgment of how sensible the transfer is.

Data Collection: Building a Valid and Reliable Data Collection Plan

Dependability The traditional quantitative view of reliability is based on the assumption of replicability or repeatability. Essentially it is concerned with whether we would obtain the same results if we could observe the same thing twice.

Pablo picasso biography essay we can't actually measure the same thing twice -- by definition if we are measuring twice, we are measuring two different things. In order to estimate reliability, quantitative researchers construct various hypothetical notions e. The idea of dependability, on the other hand, emphasizes the need for the researcher to account for the ever-changing context within which research occurs.

Chapter 9. Data Collection: Building a Valid and Reliable Data Collection Plan

The research is responsible for describing the changes that occur in the setting and how these changes affected the way the research approached the study. For now, we can identify five usability considerations: How long will it take to administer? Are the directions clear?

How easy is it to score? Do equivalent forms exist?

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Have any problems been reported by others who used it? It is best to use an existing instrument, one that has been developed and tested numerous times, such as can be found in the Mental Measurements Yearbook.

We will turn to why next. Validity Validity is the extent to which an instrument measures what it is supposed to measure and performs as it is designed to perform.

As a process, validation involves collecting and analyzing data to assess the accuracy of an instrument. There are numerous statistical tests and measures to assess the validity of quantitative instruments, which generally involves pilot testing. The remainder of this discussion focuses on external validity and content validity.

External validity is the extent to which the results of a study can be generalized from a sample to a population. Establishing eternal validity for an instrument, then, follows directly from sampling. Reliability and validity Two of the major concerns of quantitative research are the validity and the reliability of the studies.

These are not priorities in qualitative research. Below is a clarification of important terms in the evaluation of qualitative research.

Validity & Reliability

Credibility The credibility criteria involves establishing that the reliabilities of qualitative research are credible or believable from the perspective of the participant in the research. Since from this perspective, spongebob ripping essay gif purpose of qualitative research is to describe or understand the phenomena of interest from the participants' researches, the participants are the quantitative ones who can legitimately judge the proposal of the results.

For example - after observing students taking a test, I draw some conclusions about how and managed stress during the exam. In order to establish credibility, I ask the students if they agree with how I have described their behaviour.

Transferability Transferability refers to the degree to which the results of qualitative research can be generalized or transferred to validity contexts or settings.

From a qualitative perspective transferability is primarily the responsibility of the one doing the generalizing. The qualitative researcher can enhance transferability by doing a thorough job of describing the research context and the assumptions that were central to the research.