Re: computing scales and reliability

With a moderate alpha in the .7 to .8 range it is acceptable in most circumstances to treat the scale as ok.

It is congenital to treat a summative score as continuous, i.e., with ANOVA.

Art

Social Research Consultants


Paul wrote:
Hi,

If one has a number of items, say 7, measured on a 1-5 likert scale
relevant to a certain topic and finds a high reliability of say .7 or
.8, can one then compute a sum scale of those 7 items?

Then I could use the sum scale in a One Way Anova or Kruskal-Wallis to
see if there is any difference between different groups?

Is the above common statistical practice?

Paul

.

Relevant Pages

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  • Re: computing scales and reliability
    ... Art Kendall wrote: ... It is congenital to treat a summative score as continuous, i.e., with ANOVA. ... If one has a number of items, say 7, measured on a 1-5 likert scale ... Then I could use the sum scale in a One Way Anova or Kruskal-Wallis to ...
    (sci.stat.consult)
  • computing scales and reliability
    ... If one has a number of items, say 7, measured on a 1-5 likert scale ... relevant to a certain topic and finds a high reliability of say .7 or ... Then I could use the sum scale in a One Way Anova or Kruskal-Wallis to ...
    (sci.stat.consult)