Exam 1

1. Metainformation

   Tag	Value
   file	Reliability_uu-reliability-017-en_uu-reliability-017-en
   name	uu-reliability-017-en
   section	Reliability
   type	schoice
   solution	FALSE, TRUE, FALSE, FALSE
   Type	Calculation
   Language	English
   Level	Statistical Literacy

   Question

   In Vedic education, transcendental meditation plays an important role. Through meditation techniques, students’ consciousness is expanded. In a questionnaire study of the effect of meditation on consciousness, an existing test with six items and a reliability rxx’ = .50 is extended by three equivalent items.

   How high do you estimate the reliability of the extended test V for consciousness?

   
   
   1. FALSE: Rvv’is approximately .50
   2. TRUE: Rvv’is approximately .60
   3. FALSE: Rvv’is approximately .70
   4. FALSE: Rvv’is approximately .75
   
   

   Solution

   Explanation: The new test is 9 items long (6+3=9). The extension factor is 1.5 (9/6=1.5). The reliability of this manygde test is calculated using the following formula:

   $r_{xx’} = $

   Filling in gives:

   $r_{xx’} = = = = 0.60 $