RT Journal Article SR Electronic T1 Sample size determination. Influencing factors and calculation strategies for survey research JF Neurosciences Journal JO Neurosciences (Riyadh) FD Prince Sultan Military Medical City SP 79 OP 86 VO 8 IS 2 A1 Al-Subaihi, Ali A. YR 2003 UL http://nsj.org.sa/content/8/2/79.abstract AB The paper reviews both the influencing factors and calculation strategies of sample size determination for survey research. It indicate the factors that affect the sample size determination procedure and explains how. It also provides calculation methods (including formulas) that can be applied directly and easily to estimate the sample size needed in most popular situations.