küszöbértéknél

Küszöbértéknél is a Hungarian locative form meaning "at the threshold value." It is derived from küszöbérték (threshold value) plus the case ending -nél, used to indicate location on a scale or boundary. In technical writing it specifies that a parameter has reached a critical value where behavior changes or a decision is made.

In mathematics and statistics, küszöbérték (and küszöbértéknél in context) denotes a boundary at which a rule changes. For example, a hypothesis test may be decided at the point where the test statistic reaches the küszöbérték, or a signal is declared detected when its amplitude crosses the küszöbértéknél. In dose–response or reliability analyses, effects or failures often occur once the dose or stress level reaches the küszöbérték.

In sensory science and physiology, the term relates to thresholds that determine perception. The absolute threshold (abszolút küszöbérték) is the minimum stimulus intensity detectable by a typical observer. When a stimulus is at or above this value, perception or response is likely; experimental results are often described as occurring at the küszöbértéknél.

As a linguistic tool, küszöbértéknél is mainly found in scientific or technical prose to mark the exact point on a scale where a transition or decision occurs. Its usage emphasizes boundary conditions, limits, and changes in regimes across disciplines.