heh~fishy think too much for number four~
I1: How many car/s do you see in the foreground?
Ans: 1 . There is only one car. The green car is painted on the yellow van.
I2: How many black dots can you count?
Ans: Zero. There are no black dots. If you focus directly on each dot, you’ll see that all of them are white. (78% answered correctly)
I3: Are the horizontal lines sloping or straight?
Ans: All of the lines are straight. The misaligned black and white blocks fool your brain into thinking that the lines are sloping. ( 85% answered correctly)
I4: Are there any grammatical errors in this sentence?
Yes. Just as in other optical illusions, we try to make sense out of what we see. We automatically discard or disregard information that does not add to our understanding. (62 % answered correctly)
I5: Which of the two central circles is smaller?
Ans: They are equal. Both circles are the same size. The circle on the right looks smaller because it is surrounded by larger circles. (83 % answered correctly)