Archive image from page 239 of Design for a brain (1954). Design for a brain . designforbrain00ashb Year: 1954 20/12 DESIGN FOR A BRAIN 2 the probability is 3/4 (instead of 1/4). Some empirical tests gave the results of Table 20/12/2. Order of matrix Number tested Number found stable Per cent stable 2x2 3X3 120 100 87 55 72 55 Table 20/12/2. The probability is higher, but it still falls as n is increased. A similar series of tests was made with the homeostat. Units were allowed to interact with settings determined by the uni- selectors, and the percentage of stable combinations found when the
Archive image from page 239 of Design for a brain (1954). Design for a brain . designforbrain00ashb Year: 1954 20/12 DESIGN FOR A BRAIN 2 the probability is 3/4 (instead of 1/4). Some empirical tests gave the results of Table 20/12/2. Order of matrix Number tested Number found stable Per cent stable 2x2 3X3 120 100 87 55 72 55 Table 20/12/2. The probability is higher, but it still falls as n is increased. A similar series of tests was made with the homeostat. Units were allowed to interact with settings determined by the uni- selectors, and the percentage of stable combinations found when the number of units was two; the percentage was then found for the same general conditions except that three units interacted; ioo 50 2 3 number of variables Figure 20/12/1. and then four. The general conditions were then changed and a new triple of percentages found. And this was repeated six times altogether. As the general conditions sometimes encour- aged, sometimes discouraged, stability, some of the triples were all high, some all low ; but in every case the per cent stable fell as the number of interacting units was increased. The results are given in Figure 20/12/1. 224
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