It's well worth stepping back for a minute and consider the bias of that paper. It's published by a company who profit from the selling of this form of testing!
The tests are a load of nonsense and are just in place to satisfy some moron in HR. Remember that during CTC selection your rarely encounter an actual pilot. Then they'll feed you the bullsh1t about because you did very well on the computer tests you'll be a very good pilot
Agree with SeventhHeaven. I remember listening to a senior Ryanair figure at a conference heavily criticising the "entrance selection" to various FTOs. I don't think he's far off the money.
Far more important is you as a person, can someone sit next to your for 8 hours and not want to slit their wrists?