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All this comment does is show you're not an expert in scientific analysis and statistics, that's standard nomenclature for setting up a statistically valid experiment. Most statistical experiments have everything to do with a null hypothesis which can be statistically accepted or rejected based on the statistical analysis.
Originally posted by Matrix Rising
The effect that Bem showed has nothing to do with the null hypotheses.
In the end the paper offers some promising methods but should not be taken as evidence for precognition without extensive independent replication of the results, particularly since there are significant questions about the introduction of bias into the analysis of the data.
Most experiments that purport to show evidence for psychic powers, alternative and quack medicine, or other woo fail to use proper methods and controls to limit experimenter bias. When replication attempts are made that do control for experimenter bias the results are shown to be no better than chance.
Most experiments that purport to show evidence for psychic powers, alternative and quack medicine, or other woo fail to use proper methods and controls to limit experimenter bias. When replication attempts are made that do control for experimenter bias the results are shown to be no better than chance.
Bem says in his own paper that replication needed to see if he has successfully avoided the experimenter bias problem in his approach. From Bem's paper pages 49-50:
Originally posted by Matrix Rising
Yes, Bem's study needs to be replicated but there's zero evidence of bias from the experimenter.
One of the major obstacles to successful replication in psychology generally is the
influence of the experimenter on the results. The sex, age, and demeanor of the experimenter can
interact with characteristics of the participants, and expectancies of the experimenter can affect
the results in subtle ways (Rosenthal, 1966). Psi research is no exception. In three psi
experiments specifically designed to investigate the experimenter effect, a proponent and a
skeptic of psi jointly ran a psi experiment, using the same procedures and drawing participants
from the same pool (Schlitz et al., 2005; Wiseman & Schlitz, 1997, 1999). In two of the three
experiments, the proponent obtained a significant result, but the skeptic did not.
My approach to the problem of experimenter effects has been to minimize the
experimenter’s role as much as possible, reducing it to that of greeter and debriefer, and leaving
the experimental instructions and other interactions with the participant to the computer program.
Moreover, I used several undergraduate experimenters in each experiment and deliberately gave
them only informal training. This was to ensure that the experimental protocols are robust
enough to overcome differences among experimenters so that the protocols have a better chance
of surviving replications in other laboratories. Whether or not this strategy will be successful
remains to be seen.
I just ran across this:
Originally posted by Arbitrageur
So until the replication experiments are done, we won't know how successful he was at avoiding experimenter bias, ... according to the author of the paper!!!!
So more studies are in the works. Bem has definitely generated interest and is making the replication kits readily available to aid other researchers as it seems he is actually encouraging replication attempts based on the need for them he cited in his paper.
So far, at least three efforts to replicate the experiments have failed. But more are in the works, Dr. Bem said, adding, “I have received hundreds of requests for the materials” to conduct studies.
Most experiments that purport to show evidence for psychic powers, alternative and quack medicine, or other woo fail to use proper methods and controls to limit experimenter bias. When replication attempts are made that do control for experimenter bias the results are shown to be no better than chance.
One failed attempt at replication has already been posted online. In this study, Jeff Galak of Carnegie Mellon University in Pittsburgh, Pennsylvania, and Leif Nelson of the University of California, Berkeley, employed an online panel called Consumer Behavior Lab in an effort to repeat Bem's findings on the recall of words.
Bem argues that online surveys are inconclusive, because it's impossible to know whether volunteers have paid sufficient attention to the task. Galak concedes that this is a limitation of the initial study, but says he is now planning a follow-up involving student volunteers that will more closely repeat the design of Bem's word-recall experiment.
We argue that in order to convince a skeptical audience of a
controversial claim, one needs to conduct strictly confirmatory studies and
analyze the results with statistical tests that are conservative rather than
liberal.
Despite the lack of a plausible mechanistic account of precognition, Bem was able to
reject the null hypothesis of no precognition in eight out of nine experiments.
"It is also instructive to compare the psi ganzfeld effect with the results of a recent medical study that sought to determine whether aspirin can prevent heart attacks (Steering Committee of the Physicians' Health Study Research Group, 1988). The study was discontinued after 6 years because it was already clear that the aspirin treatment was effective (p < .00001) and it was considered unethical to keep the control group on placebo medication. The study was widely publicized as a major medical breakthrough. But despite its undisputed reality and practical importance, the size of the aspirin effect is quite small: Taking aspirin reduces the probability of suffering a heart attack by only .008. The corresponding effect size (h) is .068, about one third to one fourth the size of the psi ganzfeld effect (Atkinson et al., 1993, p. 236; Utts, 1991b)."
Originally posted by C-JEAN
Hi psi fans.
Look around the subjects linked by the first line of my signature,
and you will see what psi can do to the reality and to you ! !
What the BLEEP! do we know !? down the rabbit hole".
A FANTASTIC 3 DVD movie and interviews kit ! !
Blue skies.
Originally posted by RogerT
Personally, I used to be able to guess red/black way more than 50% of the time, until I 'put my money where my mouth is' and then the clarity disappeared in a whoosh of emotion. I still managed to pay my rent etc at the time, but it was very draining and I later found much easier ways to make money consistently and without any ongoing investment of time and energy, so I don't do it anymore.
OK readers, later in this article, I'm going to use an example that will involve either a garden, a sailboat, a running man or a train. Can you accurately guess which one? In a forthcoming issue of the Journal of Personality and Social Psychology (JPSP), Cornell psychology professor Daryl Bem has published an article that suggests you can, possibly more often than the 25 percent of the time on average you might expect just by chance.
Originally posted by rhinoceros
reply to post by Matrix Rising
If it was real all casinos of the world would have been bankrupted a long time ago.edit on 6-1-2011 by rhinoceros because: editing
Originally posted by rhinoceros
reply to post by Matrix Rising
If it was real all casinos of the world would have been bankrupted a long time ago.edit on 6-1-2011 by rhinoceros because: editing
Originally posted by Matrix Rising
Originally posted by rhinoceros
reply to post by Matrix Rising
If it was real all casinos of the world would have been bankrupted a long time ago.edit on 6-1-2011 by rhinoceros because: editing
It's funny cause Bem was asked the same question and the answer is how do you know people are not using Psi to hit the lottery or win in a Casino? You can't use this to refute the article because you don't know either way.