# Why do male brains not detect extra “F”

Is there a neuroscience explanation for the behavior in the following experiment? Are there any papers or research conducted to find out why this differentiation happens?

Count the number of Fs in the following text in 15 seconds:

FINISHED FILES ARE THE RESULTS OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS

If you found three Fs then you are a male.

Source for this experiment can be found in this image.

• – Arnon Weinberg Dec 28 '17 at 19:15
• Better question: are there any papers investigating whether this differentiation happens? The result seems implausible. – dkv Dec 28 '17 at 19:44
• @jjack: yes, but probably for a more innocuous reason, namely that it seems easier to detect at the beginning of a word. – Fizz Dec 31 '17 at 5:22
• I found more than 3 Fs and I’m male. How can the last statement be valid? Maybe the word ‘probably’ should be added at the very least... – tale852150 Jan 1 '18 at 2:57
• @Fizz: I see your point. Despite I was among the (lucky few?) people who did detect the extra f's. – jjack Jan 3 '18 at 16:27