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. 2015 Jan 30;6:1. doi: 10.3389/fpsyg.2015.00001

Table 4.

Results of likelihood ratio test comparing models without a random factor QTYPE (model 1) and with a random factor QTYPE (model 2).

Reaction times (RTs)
Model 1: RT ∼ ACT * WO * FREQ + (1| subj) + (1| item)
Model 2: RT ∼ ACT * WO * FREQ + (1| subj) + (1| item) + (1| qtype)

Df AIC BIC logLik Chisq Chi Df Pr( > Chisq)

Model 1 11 96613 96688 –48295
Model 2 12 95986 96068 –47981 628.56 1 <0.0001

Accuracy of responses (ANS)

Model 1: ANS ∼ ACT * WO * FREQ + (1| subj) + (1| item)
Model 2: ANS ∼ ACT * WO * FREQ + (1| subj) + (1| item) + (1| qtype)

Df AIC BIC logLik Chisq Chi Df Pr( > Chisq)

Model 1 10 2777.3 2845.2 –1378.7
Model 2 11 2587.2 2662.0 –1282.6 192.06 1 <0.0001

The test was performed for reaction times and accuracy of the responses to the comprehension task.