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| Question | Answer |
| Psych definition of behavioural choice | The distribution of operant behaviours among all alternative behaviours that produce reinforcement. |
| Choice points. | All operant behaviours involve choice as there is always usually more than 1 available reinforced behaviour at any one point in time. How then do you ditribute your time/effort? |
| Psych definition of behavioural preference | The allocation of a higher proportion of responses to an alternative |
| Steps in studying preference and choice experimentally? | Identify the key features of the situation we are interested in (create an experimental analogue), e.g., having more than one alternative that produces reinforcement. 2. Create that in the lab (Give the subject two or more alternatives which both produce reinforcement), e.g., concurrent schedule |
| Concurrent Schedule | two or more schedules; SIMULTANEOUSLY available independent schedules |
| Types of choices? | 1. Difference in reinforcer, 2. Difference in the schedules in which the reinforcers are produced, 3. Differences in the amount or delay in reinforcer. |
| Two types of concurrent schedules | Two-key procedure and Findley procedure |
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Two-key procedure DV is how it spends its time across these keys |
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Findley Procedure Similar to Gambling, the DV is the relative number of responses (proportion) allocated to each IV Two independent schedules arranged on single response key Each schedule associated with its own color Measure rates of responding on changeover key as well as responding on schedule keys |
| Why choose a over b? | Richness of schedule VI15 vs. VI1000 |
| How do subjects choose? | Richness of schedule & type of schedule |
| Problem with ratio schedules | Exclusive preference for smaller ratio means that the proportions spent on the different alternatives are always 1 vs. 0 |
| Problem with interval schedule | reinforced switching leads to maximal reinforcement and a 50/50 distribution and still tells us nothing |
| Solution on interval schedule is? | Change over Delay (COD). Prevents reinforcement of switching (after switching behaviour there is a delay before reinforcer is provided) |
| Effects of COD | The subject will spend more time on a richer/preferred alternative, i.e. matching. If VI10 vs. VI20 then the subject will recieve 6 reinforcers/minute vs. 3 reinforcers/minute. 66% vs. 33% |
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