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Put your hands up. drop the knife. drop it. >> reporter: while the volunteers make split second decisions, brain waves and hard rates checked part of an ambitious research project at washington state university partly funded by the defense department with the goal of improving justice in america. >> we don't know yet still 100 some years since teddy roosevelt had the first police firearms training in new york, we still don't know whether there's a connection between the training we give police officers and their performance in a combat situation. >> your proof of insurance and registration. >>...

A constant problem remembering where you kept your keys or last names or first names, she should laugh it off. patti ann browne has the details of this. >> are you stressing out over losing your memory? well, don't because stress makes your memory worse and new research suggests that laughter improves short-term memory by lowering stress hormones. a university in california studied older adults. half watched a funny video for 20 minutes while the others sat calmly without the video. afterwards their memory was tested and those that got to laugh scored better. why? saliva was also taken from th...

>> it reads their minds or reads their eyes? >> the brain control is done using brain waves so i'm just measuring attention levels using the mobile headset. it's not reading their minds, no. but i'm also using eye being tra tracking to determine where they are looking at. >> thank you so much into when crews come back, minutes away from first daylight when they plan to resume their search for flight 370. will the planes be able to take off? we're going to go live to perth, australia, right after this. we asked people a question, how much money do you think you'll need when you retire? then we ...

Your mind gets caught in repetiti repetition, in fearful thoughts and phobias. scientistic studies show after two to three days the brain waves shift toward stupor or delirium. i was in for 410 days, shane and josh in for four months. >> what was the sense, did you have -- what was your relationship to your jailers like? did you have correspondence? did you communicate in any way? did you have a sense that the end was coming before you finally got released? >> well, my main interrogator, he played up the good cop role. he gave me books. he also used kind of our connection to -- it seemed like ...

Distinguish more patterns. >> clearly different dogs have different brain waves but the head set is hoping to come up with the most common patterns and use those to make up the short sentences. we haven't not actually heard a dog speak because the maker still has some hurdles to overcome, like exactly how do you hook up the sensors into the dog's brain without crossing the ethical line and having animal rights activist goes crazy. the head sets are not for sale but you can preorder them for anywhere from $65 to $1,200. do you need to spend a thousand bucks to have your dog tell you he is hungr...