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{"study":"Hart","year":1975,"n.psyc":20,"mean.psyc":12.5,"sd.psyc":1.47,"n.cont":20,"mean.cont":12.3,"sd.cont":1.66}
{"study":"Wilson","year":1977,"n.psyc":8,"mean.psyc":6.5,"sd.psyc":0.76,"n.cont":8,"mean.cont":7.38,"sd.cont":1.41}