[R-sig-ME] whether the data can include participants compelete the questionnaire on only one accasion

Yanmin Wang y@nm|n@w@ng @end|ng |rom p|ymouth@@c@uk
Mon Jun 6 08:56:27 CEST 2022

it is known that linear mixed model is suitable for repeated measure. my longitudinal data is unbalanced, and many participants compelete the questionnaire on only one accasion. can i include these participants?
any help is appeciated!

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