Use a Decision Journal to Observe Your Approach, Without Inferring Decision Quality From Traits
The venue, course, and gathering examples below are fictional teaching examples. The journal and suggested timings are optional recording methods, not a validated intervention for improving decision quality.
The venue for next week’s community activity has not been settled. You are considering three options: a café near home, a convenient but noisy shared space, and a library with a quiet corner that requires ten more minutes of walking. You glance at your Big Five results and think: “I have high openness, so I should choose somewhere new. My conscientiousness is average, so perhaps I cannot choose well at all.”
Pause there. This choice is not a personality examination. For everyday decisions that involve little risk and can be adjusted, a more useful approach is to keep a decision journal:
record the context, options, information considered, uncertainties, and next review time. A Big Five trait can at most offer a tentative prompt for self-observation. It cannot establish the quality or correctness of a choice, assess ability, or judge future outcomes for you.
Shift the Question From “What Kind of Person Am I?” to “What Happened at the Time?”
The Big Five describes broad dimensions of individual differences. It is not a scorecard for a particular choice, or a measure of being “rational,” “careful,” or “able to make the right decision.” A decision also involves goals, completeness of information, time limits, feasible options, other people’s needs, and unexpected changes.
The journal aims to preserve the conditions under which you made a judgment, rather than to score you. Baron and Hershey (1988) studied outcome bias: evaluations changed with favorable or unfavorable outcomes even when the relevant information available at decision time was the same. This differs from hindsight bias, in which knowing an outcome makes it seem more foreseeable in retrospect; the two may occur together. During a review, distinguish what was known then from what happened later. Later information may reveal omissions or inform the next choice, but an outcome alone should not define the earlier process or your ability. The study did not test whether this journal template reduces bias.
The record below is for everyday choices that involve little risk and can be withdrawn or adjusted: how to arrange a short meeting, which learning material to try first, or when to do a weekend chore. It is not advice for financial, medical, legal, admissions, hiring, career, or other high-risk decisions.
A Low-Risk Decision Journal Needs Just Five Kinds of Information
The journal need not become an autobiography. A record you can revisit can fit in a phone note:
Item
What to record
Example: selecting an activity venue
Context and goal
What needs to be resolved, and within what limits?
“6 people discussing for 90 minutes; limited budget; everyone needs to hear each other.”
Options
List at least two feasible choices
Café / shared space / library corner
Information considered
Facts checked at the time and their sources
Opening hours, seat reservations, travel time, descriptions of noise at the venue
Uncertainty
What is unknown, and what conditions would change the choice?
“We do not know how busy Saturday afternoon will be; if we cannot reserve seats, we will not choose the café.”
Next review
What signals will be reviewed, and when?
The evening after the activity: could people communicate, was the budget exceeded, and what needs checking next time?
There is no blank for “which option should this personality type choose?” or “did I get it right?” You are recording observable conditions and the process at the time, rather than attaching conclusions to traits or using the outcome to judge your ability.
Three Natural Approaches: Observe Something Small, Then Decide Whether to Change Your Practice
Approach One: When Information Is Missing, Record the Gap Before Attributing Hesitation to a Trait
Liu is choosing between two online courses. Instead of writing “my conscientiousness is low, so I find it hard to persist,” he records:
Goal: complete two introductory exercises next week.\
Known: course A has written material; course B has short videos.\
Unknown: how much practice time each requires.\
Next step: try 20 minutes of each, record the time actually needed, and choose on Wednesday.
If he wants to refer to Big Five results, the question must remain tentative and open to being contradicted by reality, such as “might I be more inclined to explore new material first?” This is not a conclusion that “A must suit me.” What actually changes the decision remains the experience of trying the courses and verifiable information.
Approach Two: Under Time Pressure, Record Why You Chose This Option at That Moment
Lin unexpectedly needs to move a gathering with friends from Saturday to Sunday. He records how many people he can contact, the venue’s deadline, two friends’ known plans, and “if we still cannot confirm by 8 tonight, choose a venue that allows cancellation.”
At review, he can check whether the deadline was clear, whether alternatives existed, and whether there was enough information. Fewer people attending later does not justify working backward to “I was too impulsive that day” or “one of my traits was too high or low.” Sometimes external conditions change. The journal should preserve that possibility.
Approach Three: When an Outcome Disappoints, Examine the Process and Outcome Separately
Zhou chooses a quiet library corner, but unexpected maintenance disrupts the discussion that day. Her review might be:
Review question
Answer to record
Did the original evidence actually exist?
Yes; the area had been confirmed as usually quiet.
Which uncertainty was not addressed?
She did not ask whether a maintenance notice applied that day.
Is the outcome enough to define the process?
No. An external change affected the outcome.
What specifically should change next time?
Add a check for temporary notices on the day.
The result of this review is a clearer checklist, rather than an identity judgment that “I am bad at decisions.”
A 6-Minute Template You Can Copy
Date:
This low-risk choice:
My goal and limits:
Available options:
Information I have checked, including sources:
What I do not yet know:
Conditions that would change my choice:
My current tentative choice and reasons:
Review time and signals to examine:
Big Five reflection prompt (optional): am I mistaking a broad tendency for a conclusion, or using it in place of information that needs checking?
The last line is deliberately optional. If it raises a question you can examine, such as “do I tend to overlook deadlines when I see new options?”, you can observe it in the next record. If it only leads you to pronounce judgment on yourself, there is no need to use it.
When Not to Treat a Journal as a Tool for Making Judgments on Your Own
Once a choice involves substantial loss, health or safety, legal responsibility, major financial consequences, admissions, or career decisions, an everyday journal can only organize questions. It cannot provide advice or a ruling. Stop treating personality scores or personal notes as the basis for judgment, turn to appropriate official information, licensed professionals, or the relevant responsible parties, and follow applicable rules.
FermatMind's public assessment explanation describes versions, scoring and reference methods. Those disclosures do not validate the quality of a specific choice or predictions about an individual's decisions. This article supplies no evidence that FermatMind scores determine whether a choice is correct or that this journal improves decisions; general personality research cannot supply those conclusions. Do not record or publicly share private assessment reports, assessment records, order links or payment links in the journal.
None can tell you what to choose this time. This journal records information available at the time so that you can compare it during review. Whether it reduces retrospective rewriting or improves decisions requires separate evidence.
FAQ
Can Big Five Traits Improve Decisions?
Big Five results do not automatically improve decisions. At most, they can be tentative reflection prompts that help you ask observable questions. The basis for a choice should still be specific goals, facts, limits, alternatives, and uncertainty.
Is a Decision Journal Intended to Discover Why I Keep Making Mistakes?
No. It is better suited to preserving information from the time and examining the process: what you knew, what you missed, and what conditions would change your choice. Do not use it to diagnose personality, ability, or fixed patterns.
Does a Wrong Choice Mean the Earlier Record Had No Value?
No. Review outcomes and processes separately: external conditions can change, and available information may be insufficient. The record can help identify what to check next time, but cannot guarantee an outcome.
When Should I Stop Journaling on My Own and Seek External Help?
When a question involves health or safety, legal responsibility, substantial money, admissions, hiring, career, or other high-risk consequences, a journal cannot replace appropriate official information or professional support. First pause reliance on personality scores to make judgments.
References and Scope
Soto, C. J., & John, O. P. (2017). The Next Big Five Inventory (BFI-2): Developing and Assessing a Hierarchical Model With 15 Facets to Enhance Bandwidth, Fidelity, and Predictive Power. Journal of Personality and Social Psychology, 113(1), 117–143. https://doi.org/10.1037/pspp0000096 . This article uses it only to explain that the Big Five can be discussed at broad and more detailed levels. The study does not measure the correctness of a particular decision or validate FermatMind scores.
Baron, J., & Hershey, J. C. (1988). Outcome Bias in Decision Evaluation. Journal of Personality and Social Psychology, 54(4), 569–579. https://doi.org/10.1037/0022-3514.54.4.569 . This article uses it only to discuss how outcome information can shift evaluations of a process. It does not turn that finding into a diagnosis of individual ability or decision advice.
