I have taught my fish to bump into the glass when I pretend to kiss the glass, slalom through my fingers when I put my hand spread out in the tank and to come to my finger when I splash the water. All have been trained through positive reinforcement in the form of bloodworms for doing a task correctly it is the simplest way to train an animal and they learn such things very quickly.
How have they found the average human has a memory of 77 years? The life expectancy for men in the UK is 77 and memory can't be quantified as at which point does a memory go from being a fact to a degraded dream filled in with imiagination. Psychological studies have shown that memory in humans is 60-70% factual recall with 30-40% being imagination filling in the details from similar situations and expected results e.g. you get mugged and the persons face is covered, most people will have their imagination fill in the blank when recalling that it was a young man, as that is statistically the most likely person to have committed the crime. Memory recall can be increased with different techniues like mind maps and hypnosis but it is a relatively flimsy measurement, secondly is motor memory part of memory, I drive my car but I don't conciously think to change gear my body does it allowing my concious mind to observe hazards on the road.
Love mythbusters!! Although it is a bit overly American....
