### Notes

# raw data also include the text answers given by learners
# "/" and "-" indicate that the respective learners worked on the question but did not formulate an answer, which is why a code of 0 was assigned in these cases
# datraw1 contains the pretest results, datraw2 the posttest results, and cov1 the included covariates; the latter were collected only at the pretest time point

# transformation of numeric codes to concepts

# start of reaction (combustion) > C11kc171.ms
# corresponding questions: C11kc171, C11kc172
# 0 (no answer/answer without relevant content) and 1 (no concept) were combined into 0 (no concept) > NOCONC
# 2 > INIT
# 3 > ATTRAC
# 4 > COLSIMP
# 5 > COLEXP

# progress of reaction (combustion) > C11kc173.mf
# corresponding questions: C11kc171, C11kc172
# 0 > NOCONC (options 0/1 already combined into 0)
# 1 > MACRO
# 2 > BONDS
# 3 > COLSIMP
# 4 > COLEXP

# end of reaction (combustion) > C11ec175.me
# corresponding questions: C11ec174, C11ec175
# 0 > NOCONC (options 0/1 already combined into 0)
# 1 > LIMIT
# 2 > STATIC
# 3 > DYNAMIC

# start of reaction (esterification) > C11kc181.ms
# corresponding questions: C11kc181, C11kc182
# 0 (no answer/answer without relevant content) and 1 (no concept) were combined into 0 (no concept) > NOCONC
# 2 > INIT
# 3 > ATTRAC
# 4 > COLSIMP
# 5 > COLEXP

# progress of reaction (esterification) > C11kc183.mf
# corresponding questions: C11kc181, C11kc182
# 0 > NOCONC (options 0/1 already combined into 0)
# 1 > MACRO
# 2 > BONDS
# 3 > COLSIMP
# 4 > COLEXP

# end of reaction (esterification) > C11ec185.me
# corresponding questions: C11ec184, C11ec185
# 0 > NOCONC (options 0/1 already combined into 0)
# 1 > LIMIT
# 2 > STATIC
# 3 > DYNAMIC