Mintek Graduate Assessment Practice

What Mintek uses

Mintek is South Africa's national mineral research organisation, working on metallurgical processing, analytical services and mining technology, and it runs substantial graduate and bursary intakes. Thomas International publishes a case study on Mintek naming Thomas Assess, the Aptitude assessment known as the GIA, and the Behaviour assessment known as the PPA, used in graduate recruitment at scale.

That case study is worth flagging for a reason beyond Mintek. Thomas is often described as a vendor for small employers hiring non-graduates, and this is one of a handful of published cases that directly contradicts it: a national research organisation using the GIA specifically when hiring graduates.

A speeded test, not a hard one

The GIA measures how fast you process simple information accurately. Every individual item is easy. You could answer any one of them correctly with unlimited time and no training. The difficulty is entirely in the rate.

This surprises graduates more than any other test format, because a degree trains you to handle hard problems slowly and the GIA rewards the opposite. It also means the usual preparation instinct, revising content, has nothing to attach to. What preparation buys you here is the removal of hesitation: knowing the task shape so you spend your seconds answering rather than working out what is being asked.

It is also negatively marked, and the penalty is calibrated against how many options a task offers. Two-option tasks punish a wrong answer hardest, because a random click would land half the time. Thomas's own instruction is that speed and accuracy are equally important, which is a fair description of the scoring rather than encouragement.

The five tasks, in the order they arrive

Sitting it properly

The behaviour half

The PPA runs alongside. Twenty-four screens of four adjectives, choosing most like you and least like you, untimed and under eight minutes, producing three DISC graphs instead of a score. Work mask, behaviour under pressure, and the difference between them.

In a graduate intake this is not a second sift so much as a placement input: which stream, which supervisor, which kind of work. Research organisations run very different day-to-day environments across laboratory, field and analytical roles, and a behavioural profile is one of the inputs into where a graduate lands. Answering it as an idealised graduate rather than as yourself risks a placement that fits the profile you invented.

Frequently Asked Questions

How long is the whole assessment?

Thomas gives thirty to forty-five minutes for the GIA series including instructions and practice items, and under eight minutes for the PPA. Allow an uninterrupted hour.

Is the GIA adaptive?

No. It presents items at a fixed difficulty and lets the clock do the discriminating, which is different from an adaptive test that changes difficulty in response to your answers.

Is there a pass mark for graduate intakes?

Not published. Thomas reports the GIA against norm groups rather than as a percentage, and any cut score is the employer's decision for the specific intake.

Does practice actually improve a GIA score?

Yes on the first attempt and then sharply less. Nearly all of the gain comes from removing the cost of understanding the task while the clock is running. Once the five task shapes are familiar, further practice is training the underlying speed, which moves slowly.

Will I get feedback?

Ask. Thomas GIA reports include a per-task breakdown that is genuinely informative, and organisations running structured graduate programmes are often willing to share it.

Practise the exact battery

Our Thomas practice hub has each GIA task as a separate drill and as a complete five-task run with the real per-task negative marking, plus the PPA. For the wider graduate process, the cognitive assessment tips cover the habits that transfer between vendors.