This was developed as an age test by an R&D department at Harvard University. Take your time and see if you can read each line aloud without a mistake. The average person over 40 years of age can’t do it!
- This is this cat
- This is is cat
- This is how cat
- This is to cat
- This is keep cat
- This is an cat
- This is old cat
- This is fart cat
- This is busy cat
- This is for cat
- This is forty cat
- This is seconds cat
Now go back and read aloud the third word in each line from the top down.