TY - GEN AU - Wright,Daniel B TI - Comparing groups in a before-after design: when t test and ANCOVA produce different results SN - 0007-0998 PY - 2006///1026 KW - Analysis of Variance KW - Data Interpretation, Statistical KW - Humans KW - Models, Psychological KW - Psychology KW - methods KW - Time Factors N1 - Publication Type: Comparative Study; Journal Article UR - https://doi.org/10.1348/000709905X52210 ER -