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Psychology Tests What Is Reliability.docx

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Running head: PSYCHOLOGY TESTS 1

Psychology tests: What Is Reliability?

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PSYCHOLOGY TESTS 2

According to Weiner & Greene (2013), reliability is the ability of a test to produce the

same results when it is conducted repeatedly. The concept of reliability arises because most

researchers are likely to doubt the different outcomes of the same test administered to the same

respondent at the same time. Reliability does not imply the validity of a test. The concept means

that a test can be reliable but at the same time inaccurate. Reliability in the field of psychology

comes in when administering tests such as behavioral assessments, intelligence tests, and self-

report measures. A test is considered reliable if it has a correlation coefficient of .80 or above

0.80. The factors affecting reliability are the design of the questions and the frequency of

exposure of the subjects to the questions.

The field of psychology considers four types of reliability that are inter-rater, test-retest,

parallel-forms, and internal consistency. First, inter-rater comes in when the same test is

administered to different people. It assumes that similar people should produce similar scores. It

tests how people categorize items similarly, or they give similar scores. An example is when

people are given a test to categorize pictures of cars. A reliable result will be where they

categorize same cars in the same way. Secondly, a test-retest comes in when same people are

tested at different times. It evaluates reliability across time. The challenge with test-retest is that

it is subject to variation because the respondent moods change with time. For example, a test

administered in a classroom at different times of the day are likely to give different results.

Thirdly, there is parallel-forms which involve different people taking different tests at the same

time. It evaluates different questions, which assess the same construct. Lastly, there is internal

consistency reliability that comes in when the same construct is tested using different questions.

In a reliable test, the test should give consistent results. It evaluates the ability of an individual to

give consistent results when answering different questions of the same construct (Morgan, 2014).

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Running head: PSYCHOLOGY TESTS 1 Psychology tests: What Is Reliability? Name Institution PSYCHOLOGY TESTS 2 According to Weiner & Greene (2013), reliability is the ability of a test to produce the same results when it is conducted repeatedly. The concept of reliability arises because most researchers are likely to doubt the different outcomes of the same test administered to the same respondent at the same time. Reliability does not imply the validity of a test. The concept means that a test can be reliable but at the same time inaccurate. Reliability in the field of psychology comes in when administering tests such as behavioral assessments, intelligence tests, and selfreport measures. A test is considered reliable if it has a correlation coefficient of .80 or above 0.80. The factors affecting reliability are the design of the questions and the frequency of exposure of the subject ...
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