Question

Here is the question of today:

Reliability vs. Validity

How would you explain the difference between reliability and validity? Which examples would you use to illustrate the concept?

NCSU: Fan Aptitude Test

Suppose this clip demonstrated a serious aptitude test. What would the results of a fan aptitude test reveal to us?

Is this a valid test of intelligence? Why or why not?

NFL and the Wonderlic Test

Why do employers give job candidates tests like the Wonderlic?

How do results on the Wonderlic apply to a bodily-kinesthetic career in the National Football League?

In another way from you answer to #2 above, how important are Wonderlic results to NFL owners and coaches?

What happened to Pat McAnally, the player who earned the only perfect Wonderlic score in NFL history? What does this say about aptitude tests like Wonderlic?

Answer 1

Reliability refers to the findings of repeated measuring test. Reliability indicates the correlation between the results of the measuring test. For e.g., Inch tape will give different measures over a period of time whereas IQ test should not show different score over a period of time.

Validity is the extent of measure of the test. It refers to the believability of the measuring test. For e.g IQ test should measure only the intelligence and nothing other than that. There is a relationship between the valid and reliable. If the data is valid, then it must be reliable. But not all reliable data are considered as valid. For e.g, if a person takes different IQ scores every time, then the test will not be valid.

NC state fan Aptitude test reveals the performance of overall positive results. It helps to detect the experience of the participants and their interest, confident, anxiety, and preparedness towards the test. The bias is removed by eliminating the errors. Fan Aptitude test is a valid test for measuring the IQ level and cognitive ability. Because it has only one right answer and measures how quickly the participants are answering.

Wonderlic test is given to employees to check the employee ability to do the certain task and under pressure. It is an IQ test which quickly covers all areas of cognitive abilities such as maths, reasoning, skills, personality, and vocabulary. It is given to the employee prior to the hiring process.

Wonderlic test is widely used in the National Football League to predict the performance of the players. The players have to complete 50 questions in 12 minutes. It also predicts the future performance of the players. It is very important for the coaches because it assesses the mental proficiency of the players. They believe is a good predictor for the success and makes the player brisker.

Harvard Alum PatMCAnally is the only player who scores highest in the Wonderlic test. But some critics have arisen that it is not measured correctly. They say an aptitude test like Wonderlic only assess the cognitive ability and work-related tasks. It will not measure the football intelligence.