Article in Revista Colombiana de Computación · January 001 Source: dblp citations reads 217 authors

QUESTIONS
OPERATIONAL
DEFINITION
OF THE
INDICATORS
MEASUREMENT
SCALES
FORMULATION
OF THE
VARIABLES
CHARACTERISTICS OF THE PARTICIPANTS
MEASUREMENT INSTRUMENTS DIRECTED TO:
•
Unit heads and/or project leaders.
•
IS-developers or analysts.
•
Users of the IS-developed with CASE tools.
QUESTIONS
OPERATIONAL
DEFINITION
OF THE
INDICATORS
MEASUREMENT
SCALES
FORMULATION
OF THE
VARIABLES
OPERATIONAL
DEFINITION
OF THE
INDICATORS
MEASUREMENT
SCALES
FORMULATION
OF THE
VARIABLES
CHARACTERISTICS OF THE PARTICIPANTS
MEASUREMENT INSTRUMENTS DIRECTED TO:
•
Unit heads and/or project leaders.
•
IS-developers or analysts.
•
Users of the IS-developed with CASE tools.
Figure 2. Operational definition of indicators and design of measurement instruments. 
Two types of scales were used for measuring the variables: a five-point Likert-type scale (1 to 5) 
based on the extent of agreement (5) or disagreement (1) with the item, and a continuous scale for 
these research variables based on percentage ratios (0% to 100%) and absolute ratios (0 to 1). 
3.2 Construct validation
Content validity, which assesses the completeness and soundness of the measurement, was 
established through the careful selection of items that had been previously validated in prior 
studies [4,5,6,10,14,15,17,20,22,23,24,25,27,28,30,32]. To further reduce the possibility of any 
non-random error, three academic experts from different universities and two IS senior executives 
in the software development units were asked to review the questionnaire with respect to its 
validity, completeness and readability. Their suggestions were carefully reviewed and the 
questionnaire was adapted accordingly so that it would better reflect industry practices and naming 
conventions. 
Cronbach’s alpha coefficient was calculated to assess measurement reliability. The analysis 
showed that the reliability of variables was significantly higher than the value of 0.86 suggested by 
Hernández et al. [13] for the early stages of basic research; principal component factor analysis 
was used to test this validity property. The results of Cronbach’s alpha coefficient to the 
questionnaires are presented in Table 3.