Predicting one of 2 characters you will randomly press

#1

Post by aram » Fri, Jul 15, 2016, 1:46 PM UTC

Predicting one of 2 characters you will randomly press
github.com

Re: Predicting one of 2 characters you will randomly press

#2

Post by dzdt » Fri, Jul 15, 2016, 1:59 PM UTC

Doesn't work from my smartphone. Sounds like a fun challenge though, would like to try.

Re: Predicting one of 2 characters you will randomly press

#3

Post by amake » Fri, Jul 15, 2016, 2:09 PM UTC

dzdt wrote: post #2

Doesn't work from my smartphone. Sounds like a fun challenge though, would like to try.

I'm on OS X with Firefox 47.0.1 and it doesn't work for me either :(

Re: Predicting one of 2 characters you will randomly press

#4

Post by throwaway2016a » Fri, Jul 15, 2016, 2:11 PM UTC

For me it is pretty consistently 50% +/- 5 even after a minute. It doesn't seem to work well if you repeat the same key a lot (i.e don't flip to often).

Re: Predicting one of 2 characters you will randomly press

#5

Post by oneeyedpigeon » Fri, Jul 15, 2016, 2:13 PM UTC

throwaway2016a wrote: post #4

For me it is pretty consistently 50% +/- 5 even after a minute. It doesn't seem to work well if you repeat the same key a lot (i.e don't flip to often).

I got 52% after a good lot of keypresses (not sure exactly how many). I chose to not look at the screen at all during that time - I think that probably helps.

Re: Predicting one of 2 characters you will randomly press

#6

Post by justinsaccount » Fri, Jul 15, 2016, 2:15 PM UTC

amake wrote: post #3

dzdt wrote: post #2

Doesn't work from my smartphone. Sounds like a fun challenge though, would like to try.

I'm on OS X with Firefox 47.0.1 and it doesn't work for me either :(

I'm on OS X with Firefox 47.0.1 and it works fine. It doesn't display anything until the 6th keypress.

Re: Predicting one of 2 characters you will randomly press

#7

Post by widforss » Fri, Jul 15, 2016, 2:16 PM UTC

throwaway2016a wrote: post #4

For me it is pretty consistently 50% +/- 5 even after a minute. It doesn't seem to work well if you repeat the same key a lot (i.e don't flip to often).

This is definetly not working. I'm certain that one can write a program like this, but I'm consistenly getting 50 % even though I use different strategies every time.

Re: Predicting one of 2 characters you will randomly press

#8

Post by js8 » Fri, Jul 15, 2016, 2:19 PM UTC

Is there, for a given k, an easy to remember sequence (easy to remember algorithm with little state) that has all the k-grams with the same frequency?

For k=1: 01 repeating

For k=2: 0011 repeating

For k=3: 00010111 repeating

Re: Predicting one of 2 characters you will randomly press

#9

Post by overlordalex » Fri, Jul 15, 2016, 2:19 PM UTC

throwaway2016a wrote: post #4

For me it is pretty consistently 50% +/- 5 even after a minute. It doesn't seem to work well if you repeat the same key a lot (i.e don't flip to often).

This is actually due to a psychological thing where humans don't find long strings of repeated letters/digits "random" and hence will flip more frequently than you'd expect from a machine.

I also recall there being a problem in the use of 5-grams which lead to a sequence in which it guessed 0%, but I'm struggling to find it now.

Re: Predicting one of 2 characters you will randomly press

#10

Post by vorotato » Fri, Jul 15, 2016, 2:20 PM UTC

It works if you're trying to be random, however if you're trying to react and respond to its patterns you can win.