Very interesting. I've thought for a long time that the boringness of the Rhine cards might influence the results.
If the experiment is tracking a real effect, it should be stronger with the subjects' preferred sort of erotic pictures.
Yup. The paper notes that initially they got a statistically significant effect in women, but nothing in men. They were using a standard library of erotic images intended to be used in scientific experiements. They then started using modern hardcore internet pornography instead of the standard scientific library of pornography and the results were then comparable.
...In our first retroactive experiment (Experiments 5, described below), women showed psi effects to highly arousing stimuli but men did not. Because this appeared to have arisen from men’s lower
Ben Goertzel has a rather long psi-related article in Humanity Plus Magazine, apparently prompted by the recent precognition study to be published in Journal of Personality and Social Psychology. He's arguing that psi is real and we should expect to see the results of this study replicated.