What will be the best study design for monitoring athletes progress every 6 months for 3 years. There will be an intervention program after first data collection. No control group or randomized control.
Thinking of Quasi-experimental (time series design-multiple measures before and after intervention) or multi factorial study(Three way design since I have three independent and three dependent variable).
Thanks in advance.
Cristian Popa
Keep it simple: start with repeated measures ANOVA
https://statistics.laerd.com/spss-tutorials/one-way-anova-repeated-measures-using-spss-statistics.php
Regards!
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David L Morgan
You could consider analyzing growth curves via hierarchical linear modeling.
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