Visual Attention, Scanning and Attention to Detail
What is actually tested
These items measure how reliably you can search a dense field and detect a match or a difference. Formats include finding a target string among near-identical distractors, comparing two lists or codes for discrepancies, cancellation tasks (cross out every instance of a symbol), and spotting the one altered detail between two versions of a form.
The recurring traps
The most frequent is the near-miss character pair: O and 0, l and 1 and I, 5 and S, rn and m, cl and d. Another is transposition - AB1234 against AB1243 - where the characters are all present but in the wrong order. A third is the shifted-field error, where you lose your place in a dense grid and re-scan or skip a region. A fourth is speed pressure: the format rewards throughput, so candidates accelerate until accuracy collapses; errors cluster in the final third of the page. A fifth is expecting a visually obvious target when the target is defined by a rule, such as "any code containing two vowels".
Worked example
You must find every code matching the pattern letter-letter-digit-letter (e.g. KX4P). The distractor KX44 contains a second digit, and P4KX has the digit in the wrong position. Checking position by position, left to right, catches both, whereas a global glance at "contains the right characters" does not.
Rule of thumb
Scan systematically in blocks - left to right, row by row, using a finger, cursor or mental pointer - and reset deliberately at the start of each row. Read target patterns as a sequence of positions rather than a set of characters.