The blog of Xeno, a slightly mad scientist
Can your brain detect events before they even occur? That was the stunning conclusion of a 2012 meta-analysis of experiments from seven independent laboratories over the last 35 years, which found that the human body “can apparently detect randomly delivered stimuli occurring 1-10 seconds in the future” (Mossbridge, Tressoldi, & Utts, 2012). In the studies, physiological readings were taken as participants were subjected to unpredictable events designed to activate the sympathetic nervous system (for example, showing provocative imagery) as well as ‘neutral events’ that did not activate the nervous system. These readings showed that the nervous system aligned with the nature of the event (activated/not activated) – and what’s more, the magnitude of the pre-event response corresponded with the magnitude of the post-event response.
In a more recent paper, researchers have critically analysed these findings, considering possible mundane explanations for the results and also the implications of the results if they truly do point to a paradigm-shaking discovery:
The key observation in these studies is that human physiology appears to be able to distinguish between unpredictable dichotomous future stimuli, such as emotional vs. neutral images or sound vs. silence. This phenomenon has been called presentiment (as in “feeling the future”). In this paper we call it predictive anticipatory activity or PAA. The phenomenon is “predictive” because it can distinguish between upcoming stimuli; it is “anticipatory” because the physiological changes occur before a future event; and it is an “activity” because it involves changes in the cardiopulmonary, skin, and/or nervous systems.
They found that “neither questionable research practices (bias) nor physiological artifacts seem to be able to explain PAA”, and that “the evidence indicates that there is a temporal mirroring between pre- and post-event physiological events, so that the nature of the post-event physiological response is correlated with the characteristics of the PAA for that event.”
The authors of the paper also point out fascinating aspects of the research, such as the fact that “PAA is an unconscious phenomenon” that “appears to resemble precognition (consciously knowing something is going to happen before it does), but PAA specifically refers to unconscious physiological reactions as opposed to conscious premonitions”. The implication is that “there must be a necessity for PAA to remain non-conscious most of the time”, given that “if some part of our nervous system can obtain information about events seconds in the future, wouldn’t we have evolved to make this information conscious?” …
From the paper:
It has been known for some time that arousing and neutral stimuli produce somewhat different post-stimulus physiological responses in humans (Lang et al., 1993, 1998; Cuthbert et al., 1996, 2000). However, what is remarkable is that many of the studies examined here make the claim that, for instance, the same physiological measure that yields a differential post-stimulus response to two stimulus classes also yields a differential pre-stimulus response to those same stimulus classes, prior even to the random selection of the stimulus type by the computer. Authors of these studies often refer to the effect as presentiment (sensing an event before it occurs) or unexplained anticipatory activity; we favor the latter terminology as it describes the phenomenon without implying that the effect truly reflects a reversal of the usual forward causality.
My explanation: Light, from our perspective, is a time traveler. At the speed of light there’s no time to cover any distance, but there’s also no distance to cover. Light is everywhere now (it’s perspective) that it will already (from our perspective) be. Thus, there is no limit to how far ahead we can sense if we are unconsciously processing the full time-spectrum of light. There is really only one photon of light in the universe and it is everywhere at the same time. Think about this: Everything you see in your now is from everywhere and every-when.