Conti and Musty (1984) bilaterally injected either a placebo or 0.1, 0.5, 1, or 2 micrograms (g) of THC directly into the nucleus accumbens of rats. The investigators recorded the change in the activity level of the animals after injection. It was expected that activity would increase more with smaller injections than with larger ones. The data is presented in the table below. Placebo Sq/dv 0.1 g Sq/dv 0.5 g Sq/dv 1g Sq/dv 2g Sq/dv 30 60 71 33 36 27 42 50 78 27 52 48 38 71 60 38 52 59 58 51 20 28 65 35 29 26 93 58 35 34 8 33 74 46 24 41 46 67 32 17 49 63 61 45 50 49 45 57 47 52 M=34 M=51 M=60 M=48 M=3 8