
Most pre-employment assessment software works exactly as sold. You pick tests from a library, send a link to every applicant, and by Friday each one has a score. The trouble starts the following week. A hiring manager looks at a candidate who scored 72 and asks whether that is good for this job, and nobody in the room can answer.
That is the real problem with how most organizations buy assessments. The test is the easy part. The decision is the hard part, and the decision is exactly what the software leaves on your desk.
We Did Not Buy a Testing Problem. We Bought a Decision Problem.
Here is the uncomfortable truth. Our profession has spent two decades getting very good at administering tests and not much better at using them. The platforms have improved. Libraries run to hundreds of instruments, candidates finish on their phones, and scores land in the applicant tracking system before lunch. None of that tells a sales director whether to hire the person in front of her.
A percentile ranks a candidate against other people who took the same test. It says nothing about your role, your team, your customers, or what your best performers actually do differently. A manager handed a percentile has two options: guess, or ignore it. Most do both, depending on the week.
That is not assessment. That is expensive data entry.
The Evidence Says the Method Matters More Than the Tool
The most rigorous recent look at what predicts job performance came in 2022, when Paul Sackett, Charlene Zhang, Christopher Berry and Filip Lievens re-analyzed decades of selection research in the Journal of Applied Psychology. Their findings reshuffled a list many of us had memorized.
Structured interviews came out on top, with an operational validity of roughly .42. Job knowledge tests followed at .40, empirically keyed biodata at .38, work samples at .33, and cognitive ability at .31. Unstructured interviews landed at .19. Years of job experience, the variable most hiring managers still lean on hardest, came in at .07.
Read those numbers as an owner rather than as a practitioner. The single strongest predictor is not a test at all. It is a disciplined process built around what the job requires. The tests that do predict performance work best when they feed that process, not when they replace it.
The lesson for anyone buying assessment software is direct. A tool that produces a score without a structure around it is capturing a fraction of the value you are paying for.
Fairness Is Not the Vendor’s Job. It Is Yours.
There is a second conversation most buyers skip, and it carries real legal and financial exposure.
Under the federal Uniform Guidelines on Employee Selection Procedures, if any group is selected at less than 80% of the rate of the highest-selected group, that gap is treated as evidence of adverse impact. Practitioners call it the four-fifths rule. If 50% of one group passes your screen and 35% of another group passes, the second group is selected at 70% of the top rate, and you have a problem that warrants review.
Two details matter here. First, that calculation runs on your applicants, not on the vendor’s norm group. A test can look clean in a technical manual and still produce a gap in your applicant pool. Second, the Guidelines apply to the employer using the procedure. The vendor built the test. You own the outcome.
That is not a reason to stop testing. Well-chosen, job-related assessments are among the most defensible selection tools available. It is a reason to know who is checking your pass rates, how often, and what happens when the numbers drift.
Eight Questions to Ask Before You Sign
Most buyers evaluate assessment software on price, test library size, and integration. Those matter. They are also the least likely place for an assessment program to fail. Ask all eight of these questions, and pay closest attention to the first five.
The work around the test:
- Who chooses the tests for each role, and who explains the scores to the manager who has to decide? Is that in the price or left to your team?
- Is the assessment built around this specific role, or are you picking from a menu and hoping the match is right?
- What does a hiring manager actually receive for each candidate: a percentile, or a comparison to what success looks like in that seat?
- What happens to the assessment data after the hire? Does it shape onboarding and the first year, or is the report filed and forgotten?
- Does the work connect to development, promotion, and succession, or does every later talent decision start again from scratch?
The software itself:
- What validity evidence stands behind each instrument, and who monitors adverse impact in your applicant data?
- Does it run inside your applicant tracking system at the volume you actually hire?
- What is the all-in annual cost at your real hiring volume, including the hours your team spends choosing tests and interpreting results?
Where are your managers making decisions on a number they cannot explain? Where has a strong assessment result never reached the new hire’s first manager? Where has anyone last checked your pass rates by group? Where is your organization paying for a score and doing the interpretation for free, badly?
Platforms Have a Place. Know What That Place Is.
None of this is an argument against software. If you are filling forty frontline roles this month, a high-volume screening platform is the right tool for the first cut. It screens thousands of applicants the same way, returns a result the same day, and keeps your recruiters out of spreadsheets.
The failure is asking a screening tool to do a selection job. The roles where a wrong hire is most expensive, sales, operations leadership, the managers who run your teams, deserve more than a ranked list. They deserve a definition of success built before anyone takes a test, instruments chosen to measure against it, and someone accountable for turning the result into a decision.
The smartest organizations run both. Technology handles volume early. Depth is reserved for the shortlist, where it pays for itself.
Selection Is Where Development Begins
There is one more cost buried in the typical assessment purchase. A good assessment tells you where a new hire is strong and where they will struggle. On most platforms that insight stops at the offer letter.
Think about what that means. You paid to learn exactly where your new sales leader will need support, then handed them to a manager who never saw the report. Six months later, the gap the assessment predicted shows up in the numbers, and the organization treats it as a surprise.
Development cannot fix the wrong starting material. It also cannot use information nobody passed along. The organizations that get the most from assessment treat it as the first chapter of a person’s development, not the last step of their hiring.
The Question That Actually Matters
The question is not which platform has the largest test library. The question is whether your next hire will be made by someone who understands what the score means for that role, and whether what you learned will still be working for you a year after the offer.
Organizations that ask that question stop buying scores. They start buying decisions.
Let Us Have the Harder Conversation
At LAK Group, we have sat in the operating seats your leaders occupy. We have built hiring systems inside organizations, carried the turnover numbers, and lived with the consequences of a bad senior hire. We are not lifelong consultants. That is why Talassure, our predictively valid assessment suite, starts with the role and not the test library. Developed by psychometrician Dr. Ron Trego, Talassure measures cognitive ability, behavioral traits, and occupational interests, and compares each candidate to a Success Pattern built from your own top performers. Talassure clients report more than $2.24 million in added annual revenue, 9% lower turnover, and a 7.8x boost in monthly performance. Those are client-reported results and should be read that way, but they point in the same direction as the independent research: measure against the role, and the decision gets better.
We do not hand you a score and leave. We help you build the success profile, debrief the managers who decide, and carry what the assessment found into coaching, development, and succession, so you own the system long after we are gone.
If your managers are making hiring decisions on numbers they cannot explain, you already have your answer. Start with one role. Try your first Talassure assessment at no cost at talassure.com/talent-audit, or begin a discovery conversation with LAK Group and let us look at what your current assessment spend is actually returning.
References
- Sackett, P. R., Zhang, C., Berry, C. M., & Lievens, F. (2022). Revisiting meta-analytic estimates of validity in personnel selection: Addressing systematic overcorrection for restriction of range. Journal of Applied Psychology, 107(11), 2040–2068. https://doi.org/10.1037/apl0000994
- Uniform Guidelines on Employee Selection Procedures, 29 CFR Part 1607, including §1607.4(D) (four-fifths rule). https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XIV/part-1607
- S. Equal Employment Opportunity Commission: Employment Tests and Selection Procedures. https://www.eeoc.gov/laws/guidance/employment-tests-and-selection-procedures
- Talassure: Assessment overview and client-reported results. https://talassure.com