What attention switching means
Checking dates and then amounts uses similar material but changes the criterion. Switching concerns that transition. It is easiest to observe when the new instruction and the moment of change are clearly defined.
Switching and simultaneous activity
Alternating rules is a sequence of changes, not evidence that two demanding tasks are performed simultaneously. Examine errors after each change: an answer that fits the previous rule differs from an unrelated mistake. Consider response time as well.
Practice a rule change
Try the switching mode in the Stroop trainer and follow the color or word prompt. Compare it with a constant-rule series of the same duration. On paper, alternate marking letters and numbers using a switching sequence written down in advance.
Change rules after the second number
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Your result
Step-by-step worked example
What to prepare
Prepare four numbers. For the first two, answer even or odd; for the last two, answer greater than 4 or not greater than 4. The transition is defined beforehand.
Task sample
What to do, step by step
State both rules and when to switch. First make sure you can apply each rule separately.
Answer for 2 and 5 using parity, writing the words in full.
After the transition marker, answer for 8 and 3 by comparing with 4. Stop using parity.
Keep your initial responses. Separate an incorrect classification from a response made under the previous rule.
How to check your result
Answers: 2 is even; 5 is odd; 8 is greater than 4; 3 is not greater than 4. Calling 8 even is mathematically true but does not follow the current instruction: it uses the old rule.
Your next attempt
Try new numbers with the same transition point. Keep a constant-rule series separate and use the same number of responses for comparison.
Examples in everyday tasks
Move from dates to amounts
You first check invoice dates, then receive an instruction to verify amounts. Before the next pass, change the criterion to quantity, price and total. Continuing to mark dates would apply the previous rule. The relevant transition is adopting the new criterion when it becomes applicable.
Separate meaning and formatting
On the first pass through an email, check that the request and response deadline are clear. On the second, check only headings, spaces and lists. The material stays the same while the rule changes. Notice when you return to rewriting meaning instead of performing the second check.
Change a sorting rule
Sort cards by color until a signal, then sort by shape. A red circle must now join other circles rather than other red objects. The signal defines the transition precisely. Check which responses after it would still have been correct under the old rule.
