Distinguish feeling ready from checking a conclusion
These ratings concern constraints, everyday calculation, alternative explanations and rules. A confident self-rating does not establish that an answer is correct.
Average all four numeric responses to one decimal. This gives a 1.0–5.0 confidence mean; an unscored item withholds only this group’s mean.
Four specific reasoning activities
The questions ask about identifying a constraint, checking a calculation, comparing explanations using a fact and testing a proposed rule against a new example. You estimate your confidence; the page does not supply a timed reasoning task or assess whether a rule is valid. The connection to Gardner is a broad conceptual topic, not proof that these four self-ratings measure a distinct logical-mathematical intelligence. Neither a confident response nor the use of a spreadsheet establishes correctness.
What the mean does and does not combine
Responses of 1, 2, 4 and 4 sum to 11; 11 divided by four is 2.75, displayed as 2.8. Rounding is a presentation rule, not additional precision about your mind. The item differences may matter more than the single number: you could be confident checking sums and less certain testing an explanation. No overall intelligence total is made from this mean and the other seven. A tie or a small difference between groups remains a difference in self-ratings, without a strength ranking.
Test a plan against its stated conditions
Consider a fictional meeting that must last thirty minutes, with one person available from ten to eleven and another from half past ten to noon. A proposed start at ten does not meet both stated conditions; half past ten does. The conclusion comes from the supplied constraints, not the planner’s confidence. A counterexample is selecting the time that feels convenient and assuming everyone can adjust. Real situations may have additional conditions, so a checked answer stays bound to what was actually known.
Confidence can be calibrated in either direction
A larger mean says you felt more confident about the listed activities. It does not establish better reasoning than someone with a smaller mean. You might know a task well, underestimate it, overlook a hidden assumption or set a stricter standard than another person. Limited mathematical exposure, language demands and tool access can affect the estimate. If you cannot judge from experience, use the unscored option. Missing evidence is not a low ability score, and complete other groups remain visible.
One small check with a known criterion
Choose an ordinary, low-stakes problem with information you can inspect. Write the conditions, suggest one answer and try to find a case that would make it fail. Then check the relevant fact rather than collecting unrelated detail. You may use a calculator, notes or another accessible tool. This is an optional way to observe a process, not a validated intelligence exercise or a promise of improvement. Do not substitute a quiz result for appropriate expertise in a consequential decision.
Keep the reasoning record, not a fixed identity
A useful note includes your initial prediction, the check you performed and any assumption you changed. It can support a conversation about a specific task or training need without labelling you analytical or unanalytical. Work involving numbers or systems also requires subject knowledge and evidence of actual performance. This original confidence bank supplies no IQ, percentile, aptitude threshold or hiring recommendation. A different score on another day may reflect a changed interpretation or context; it does not by itself prove cognitive growth or decline.