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Table 1 The reinforcement was given using either a fixed time schedule of reinforcement (FT), continuous reinforcement schedule (CRF) or a variable interval schedule of reinforcement (VI)

From: Marine omega-3 polyunsaturated fatty acids induce sex-specific changes in reinforcer-controlled behaviour and neurotransmitter metabolism in a spontaneously hypertensive rat model of ADHD

Behavioral procedure Session number Reinforcement schedule
Habituation, 30 min 1  
Magazine training, 30 min 2 – 3 FT 10 seconds
Flap training 4 – 5 CRF
Shaping of lever-pressing 6 – 7  
30 minutes session 8 – 13 VI 3 seconds
90 minutes session, 16 chambers 14 – 41 VI 180 seconds