Complex-Systems Research in Psychology: Errata 

The following updates are reflected in copies of the book printed after October 18, 2024:

p. 80:

If this derivative is less than 0, then the fixed point is stable. The second derivative is r, so X* = 0 is an unstable fixed point whenever r > 0 and stable whenever r < 0.
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If this derivative is larger than 0, then the fixed point is stable. The second derivative is -r, as dX/dt = -V'(X), so X* = 0 is an unstable fixed point whenever r > 0 and stable whenever r < 0.
 

 p. 110, fig. 4.15:

W = V – V^3/3+1 —> W = V – V^3/3+I
 

p. 129:

Stengers and Prigogine (1978) argued that while entropy may indeed decrease in a closed system, the process of self-organization in such systems can create ordered structures that compensate for the entropy increase, resulting in a net increase in what they called “local entropy.” 
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argued that while entropy indeed increases in closed systems, the process of self-organization in open systems can create ordered structures, resulting in a net decrease in what they referred to as “local entropy.”

p. 132, fig. 5.3:

die if more than 2 neighbors —> die if more than 3 neighbors
 

p. 221:

If \(\left\lceil X_{i}(t) – X_{j,}(t) \right\rceil > \epsilon\) nothing happens because the difference in opinion exceeds the bound \(\epsilon\).
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Comma deleted in  X_{j,}(t)

Thus, opinion of agents become −1 if X(t)Ii(t)+H is negative, and vice versa.
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Thus, opinion of agents become −1 if X(t)I_{i}(t) + H$ is positive, and vice versa.