Table 3.
Effects of Juvenile Housing Environment on Operant Sucrose Self-Administrationa
| Group Housedb | Socially Isolatedb | t-test | |
|---|---|---|---|
| Response Latencyc (sec) | 42.3±10.9 | 39.4±7.0 | n.s. |
| Response Rate (press/sec) | 11.5±2.0 | 9.8±1.6 | n.s. |
| Response Bouts (per session) | 3.1±0.3 | 3.7±0.5 | n.s. |
| Lick Latency (sec) | 1.4±0.2 | 1.1±0.1 | n.s. |
| Lick Rate (licks/min) | 133.7±10.5 | 138.4±9.0 | n.s. |
| Number of Licks (per session) | 2253±172 | 2367±168 | n.s. |
| Consumption (g/kg) | 1.07±0.08 | 1.10±0.07 | n.s. |
a
All animals were required to complete 30 lever presses to gain access to a 3% sucrose solution. When this response requirement was completed, animals had free access to a sipper tube for 20minutes (Samson & Chappell, 2001).
b
group housed, n=11; socially isolated, n=11
c
Data represents mean session data collected over the first two ‘baseline’ weeks (a total of 10 operant sessions; see text).