Free

External Validity - Essay Example

Comments (0) Cite this document
Summary
Validity can be described as the possible estimate of the truth of a specified proposal research or conclusion. Validity is extremely important in determining the perfect conclusion of an experiment conducted. Internal validity helps to determine if the conclusion for an experiment is perfect or not…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER94% of users find it useful
External Validity
Read TextPreview

Extract of sample "External Validity"

Illustrate the importance of controlling for the threats to internal validity, and explain why external validity must be determined once internal validity is obtained.
Validity can be described as the possible estimate of the truth of a specified proposal research or conclusion. Validity is extremely important in determining the perfect conclusion of an experiment conducted. Internal validity helps to determine if the conclusion for an experiment is perfect or not. In an experiment all the external factors are also to be considered so that a perfect conclusion is derived. For e.g. in a school a scheme is adopted to improve the grades of the students and to check if the scheme is successful or not a test is taken before and after the scheme is implemented. If the grades of the students seem to improve it cannot directly be concluded that the scheme was the factor which improved the grades. So in order to come up with a perfect conclusion all the external factors are also considered. In order to conduct a research and come up with a perfect solution all the threats to internal validity should be analyzed. If the threats to internal validity are not analyzed and controlled they can and might distort the result or conclusion of the experiment conducted. For e.g. in the above mentioned example other factors can also lead to the improvement of the grades. Other factors like the diet of students, concentration of the students etc. Hence if the researcher concludes that the scheme was the only factor which improved the grades of the students without analyzing other threats or factors he would possibly face several criticism. And his conclusion would not be confirmed until and unless all the factors that can affect the grades of the students are reviewed. This shows that the threats to the internal validity have a great importance and a conclusion cannot be derived without controlling and analyzing these threats.
An experiment is conducted to confirm the cause of a certain state, situation or action. If the threats posed to internal validity are removed a possible conclusion can be derived for the experiment conducted. But after the internal validity is obtained it is necessary for the researcher to find out the external validity. External validity engages the degree to which the outcome of an experiment can be applied. For e.g. the scheme adopted in one school to improve the students grades would not necessarily be effective in the other schools because of different procedures and systems. After the internal validity is derived it is necessary for the researcher to determine the external validity too so the result of the experiment can be applied to other samples too. If the external validity is determined it would help other people to use the conclusion of the experiment conducted usefully. The researcher before giving a conclusion to the experiment should analyze the ecological and population factors so that the conclusion can be used universally. External validity is directly dependent upon the effectiveness of internal validity. In order to correctly derive the external validity the researcher has to conduct the experiment in such an environment that the results or conclusions can be used universally.
Bibliography
Tebes, J. K. "External Validity and Scientific Psychology." AMERICAN PSYCHOLOGIST. 55 (2000): 1508.
Meltzoff, Julian. Critical Thinking About Research: Psychology and Related Fields. Washington, DC: American Psychological Association, 1998. Read More
Cite this document
  • APA
  • MLA
  • CHICAGO
(“External Validity Essay Example | Topics and Well Written Essays - 500 words”, n.d.)
External Validity Essay Example | Topics and Well Written Essays - 500 words. Retrieved from https://studentshare.org/miscellaneous/1530606-external-validity
(External Validity Essay Example | Topics and Well Written Essays - 500 Words)
External Validity Essay Example | Topics and Well Written Essays - 500 Words. https://studentshare.org/miscellaneous/1530606-external-validity.
“External Validity Essay Example | Topics and Well Written Essays - 500 Words”, n.d. https://studentshare.org/miscellaneous/1530606-external-validity.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document

CHECK THESE SAMPLES OF External Validity

Measures and Reliability and Validity Discussion / External and Internal Validity Discussion

...?Re: Posting on Scenario F “Confounding variables are those that aren’t the independent variable where the s are different from the other conditions. These are somewhat spontaneous, in that they come about during testing the hypothesis.” (Stangor, 2011). The fact that one group got to view the words twice is not a confounding variable, but the independent variable. As per the quote from Stangor (2011) above, with which you began your post, confounding variables are subject differences that are not the independent variable, and they arise spontaneously. The group that saw the 20 words twice can be said to have increased exposure. Increased exposure is what’s being used as an independent variable to see whether their reports... Posting on...
1 Pages(250 words)Coursework

Threats to Internal and External Validity

...?THREATS TO THE VALIDITY OF AN EXPERIMENT Firstly, we begin by clarifying what we mean by threats to validity. Maxfield and Babble (2005) put it in very simple terms: these are, according to them, “possible ways that a researcher might be wrong in inferring causation. (page 191)” Burns (1997:1) defines validity as, “ the best available approximation to the truth of a given proposition, inference or conclusion. In other words, when we make some claim, does the evidence support our conclusions.”  Factors affecting internal validity ask whether or not the research conditions warrant the conclusions. On the other hand, factors affecting external...
3 Pages(750 words)Essay

Paper- Validity: External, internal, construct

...methods, while non-experimental studies tend to be questioned because of their potential for higher rater bias (Jarde, Losilla, & Vives, 2012, p.98). Non-experimental research designs, nevertheless, cannot be completely excluded because they can efficiently answer problems and produce practical results for studies that aim to explore the topic and its constructs and research trajectories (Jarde, Losilla, & Vives, 2012, p.98). This essay compares and contrasts the characteristics of external, internal, and construct validity. It also determines threats to external and construct validity, and how validity issues could impact the proposed research. Internal...
6 Pages(1500 words)Assignment

Validity: External, internal, and construct

...? Validity: External, internal, and construct Introduction The establishment of authenti originality and applicability of any research work is a matter of judgment. The judgment is derived from the understanding drawn from various factors. There are mainly 2 different types of factors which are validity and reliability. Both the factors complement each other and both are indispensable in the successful establishment of the research efforts. Validity is related to mainly three different types of reasoning, which are external validity, internal validity and construct validity (Green, 2008). In order to...
4 Pages(1000 words)Research Paper

External, Internal, and Construct Validity

...External, Internal, and Construct Validity Research and testing play a crucial role in modern lives and it is essential to comprehend that researchesare mainly concerned with the relationship between variables. One of the major objectives of every research is to assess casual relationships among conceptual variables which are known as constructs. In assessing the relationships among the various constructs in the study, a research addresses three main issues. First, it analyzes if there is empirical relationship which can be observed between scores on a measured independent variable and dependent variable. Second, the research analyzes if it is logical to consider the relationship as casual and it is...
4 Pages(1000 words)Essay

Validity: External, internal, construct

...Validity: External, internal, construct Table of Contents Validity 3 Construct Validity 3 External Validity 4 Exploring Variables 4 Data Collection 5Conclusion 5 References 6 ValidityValidity does not have any fixed definition. The extent to which any theory, concept or measurement is well-founded or matches accurately with the real issues is considered to be valid. Validity comes from the word valid. Valid in Latin means strong. So we can say that validity is a measurement tool to measure the degree to which the claim...
3 Pages(750 words)Research Paper

Validity

... Module Validity Measurement can be defined as the systematic and replicable process by which events or objects are quantified andclassified with reference to a particular dimension. Reliability of a measurement defines the degree to which a measurement can be relied upon to secure consistent results with continued application. The validity of the measurement defines the rate at which any instrument or an approach is successful in the description or the quantification of the measures that it is designed to measure. Validity portrays the errors in measurement that are constant or systematic. Validity can be face validity, criterion-related validity, formative validity and sampling validity (Klaus, Boyle and Simon, 13). Reliability... and...
1 Pages(250 words)Essay

Nutritional Epidemiology (external validity)

...Nutritional Epidemiology (External validity) The positive contributions of biomedical research in medicine are self-evident. They range from new drug discovery and therapeutic options to state of the art diagnosis and patient management systems. Research seeks and answers questions that overall provide solutions that improve the status core. Scientific studies can only be done on a proportional presentation of the population or even non-human models due to the unpredictability of results. Consequently researchers have been faced with criticism on external validity of their findings. The external validity of any research finding...
3 Pages(750 words)Essay

Construct Validity

...Construct validity Researchers create constructs to facilitate measure of variables in studies. The Big Five Personality Test tool is an example of aconstruct and measures personality traits. The construct has a series of structured questions that a participant responds to, and responses are computed, based on predetermined categories, to identify elements of personality traits. Some responses are measured on ordinal scale while other are measured on a nominal scale. Construct validity is the level of accuracy with which a construct measures an element that it is expected to measure. Ability to measure a variable of intention identifies construct validity and comparing test results,...
1 Pages(250 words)Assignment

Internal vs. External Validity in Research

...Internal vs. External Validity in Research Grade (January 2, Internal vs. External Validity in Research Part 1: 1. What is internal and external validity? When conducting research, why is there often a trade-off between internal and external validity? Internal validity refers to the certainty that a research that has been undertaken presents true results of the relationship between the dependent and the independent variable in the study, which has not been influenced by any other extraneous factor (Mitchell & Jolley, 2001). Thus, internal validity of research simply means that the results of the research validate the hypothesis of the research making the hypothesis is highly believable and reliable, such that it eliminates... the...
2 Pages(500 words)Coursework
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.

Let us find you another Essay on topic External Validity for FREE!

Contact Us