A psychotechnical certificate is the official document stating that a person has sufficient mental and psychomotor skills to drive in private and public institutions. This determination is made after computer-assisted tests and an expert evaluation. With a psychotechnical certificate, individuals verify they possess the required cognitive and psychomotor abilities for safe driving.
The mental abilities assessed during this evaluation include the following:
- Attention capacity
- Comprehension and judgment skills
- Speed and distance perception
- Detection of stimuli within a wide field of view
- Visual continuity in shape perception
The psychomotor skills measured in the psychotechnical assessment include:
- Reaction time
- Coordination level
Candidates who complete the tests and receive a positive psychotechnical report must have that report confirmed by the district health directorate or the chief physician of a state hospital; after approval, the psychotechnical certificate is issued.
Mental Ability – Attention Capacity
Attention is evaluated using methods that require the candidate to focus on a critical stimulus among multiple simultaneous stimuli and to selectively perceive repeated critical cues. The test measures how consistently and accurately the candidate notices these target stimuli.
Key characteristics of attention tests are as follows:
- Assessments should consider performance speed, performance quality, and consistency; these parameters must be analyzed and expressed as numerical data.
- Performance speed should be measured by timing the moment the candidate detects the critical stimulus.
- For results to be reliable and valid, the attention test must run for at least 10 minutes.
- When relating performance speed to quality, the results should not simply be equated to a norm group without proper analysis. To facilitate interpretation, a “Performance Speed / Performance Quality” diagram should be produced as a graphical summary.
Mental Ability – Comprehension and Judgment
Tests that measure comprehension and judgment should evaluate analytical thinking, the ability to combine clues to form logical conclusions, and the capacity to establish connections between facts. These abilities reflect how a candidate understands and evaluates driving-related situations.
Features of comprehension and judgment tests include:
- Use of nonverbal test formats is preferred for these assessments.
- To enable automatic computer comparison, separate groups should be defined according to age ranges and education levels.
- Questions should be statistically validated to measure reasoning ability accurately.
- Items must be classified by difficulty level and distributed within the test both randomly and evenly.
Mental Ability – Speed and Distance Perception
Speed and distance perception tests evaluate how well candidates estimate the speed of moving objects and their distance to a target. These tests simulate driving scenarios where accurate judgment of motion and distance is crucial.
Test requirements for speed and distance perception:
- The moving object’s speed and distance to the target should vary so the candidate’s ability to observe both the object and its relative movement is assessed.
- A sufficient number of trials is necessary for reliable results—typically 20–30 attempts. Results must be consistent across trials to be valid.
Mental Ability – Detecting Stimuli within a Wide Field of View
Tests for wide field-of-view detection should be administered within an approximate 140-degree visual field. The assessment records at what distance the candidate notices specific stimuli and whether their reactions are appropriate and timely.
To produce accurate results and fairly evaluate candidates for a psychotechnical certificate, the test content must be prepared with this field-of-view requirement in mind.
Mental Ability – Visual Continuity in Shape Perception
Evaluating visual continuity in shape perception focuses on how long a candidate can concentrate on selection criteria during shape recognition, whether they can maintain continuous monitoring of those criteria, and the timing of their responses. Tests should measure these aspects systematically.
Characteristics of shape perception tests include:
- Using traffic signs in these tests helps connect the assessment to real driving environments, so traffic sign stimuli are recommended.
- Tests must require candidates to follow and select traffic signs according to a specific discipline.
- To be reliable, 30–40 trials are suggested for this type of assessment.
- Evaluation should include the time taken to complete the test and the latency between recognizing a sign and responding to it.
Psychomotor Skill – Reaction Time
Reaction time assessment measures the interval between perceiving a specified stimulus and responding to it. Important characteristics of reaction time tests include:
- Separately assessing decision time (how quickly the candidate determines the correct response) and motor response time (how quickly they execute the response).
- Evaluating not only the speed but also the accuracy of responses. Tests should include various visual and auditory stimuli, and responses should be recorded for both hands and feet. Performance quality is part of the evaluation.
- Responses to auditory and visual cues should be categorized and presented graphically as correct, incorrect, or delayed reactions.
Psychomotor Skill – Coordination Level
Coordination tests determine whether a candidate can produce correct responses to driving situations by coordinating multiple limbs and movements simultaneously. The evaluation examines how well the candidate can perform accurate, simultaneous actions with different body parts.
How Are Psychotechnical Evaluation Results Interpreted?
Factors that influence the psychotechnical test outcome include:
- Selective attention-based reaction time should not exceed 1.50 seconds.
- Candidates ranking outside the top 40% nationally are typically considered unsuccessful.
- Missed stimuli and false alarms during the test should not cluster in specific regions such as extreme left or right. If such clustering occurs, results for wide field-of-view detection must be considered when interpreting the overall profile.
- Candidates’ scores must remain within defined percentile ranges for valid evaluation.
How Much Does a Psychotechnical Evaluation Cost?
Psychotechnical evaluation fees vary by region. Fees are determined by agreements among local test providers and professional organizations and then set by the provincial health director following a public health committee decision. Although fees can vary, the average cost for a psychotechnical certificate typically ranges between 140 and 180 TL.