Sample size Determination for Structural Equation Modeling (SEM)

DOI: 10.14416/


  • Montree Piriyakul Department of Statistic, Faculty of Science, Ramkhamhaeng University


number of indicators (p) per factor (f/p), sample size, rule of thumb


Sample size was the problem that always raised to question of what size is correct or suitable for most researchers of structural equation analysis (SEM). Whether more subjects for high confidence in the accuracy of analysis/research or lesser subjects according to some contexts is plausible? Literature reviews show that sample size for SEM could be determined in a variety of ways depending upon different statistical formulas and rules including rules of thumbs. From a comparative study of sample size determination among 11 available formulas and rules, several plausible sizes are found to be numbers that range from large to small. In conclusion, a sufficient sample size for SEM is 200 but more or less than 200 is possible subject to complications of the SEM model itself and population size constrained.


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