Knowledge of an observer's psychometric function slope is potentially useful in clinical visual psychophysics (for example, perimetry), however, the short test times necessary in a clinical setting typically prevent slope estimation. We explore, using computer simulation, the performance of several possible procedures for estimating psychometric function slope within limited presentations (aimi...

Purpose: To evaluate a new approach for predicting nodule volume measurement bias and variability when scanning with a specific CT scanner and acquisition protocol. Methods: A GE LightSpeed VCT scanner was used to scan 3 new rolls of 3M 3/4 x 1000 Inch Scotch Magic tape with a routine chest protocol (120 kVp, 100 mA, 0.4 s rotation, .98 pitch, STANDARD kernel) at three different slice thickness...

This study aims to illustrate an overarching psychometric approach of broad relevance to investigations of two sources of construct-relevant psychometric multidimensionality present in many complex multidimensional instruments that are routinely used in psychological and educational research. These two sources of construct-relevant psychometric multidimensionality are related to: (a) the fallib...

Nowadays, operators are facing an increasing demand to ensure the committed bandwidth in broadband access links, both from customers and regulatory bodies. Usually, customers employ speedometers (such as Speedtest) to evaluate the access link performance. Such speedometers run in the user’s PC, concurrently with many other applications which may generate cross-traffic and reduce the processing ...

An Aspect-Oriented approach to software synchronization in automatic measurement systems is proposed. Tasks are synchronized by means of “aspects”, a specific software unit to better modularize properties and features transversal to many modules (“crosscutting concerns”). In this way, maintainability and reusability of a measurement software are improved: once a modification in the synchronizat...

As with other software development processes, model-driven engineering of real time software systems include quality assurance and measurement. Model-driven engineering (MDE) supports the development of real-time software systems by means of a set of languages, processes, methods and tools. To measure the models, a dedicated measurement software has to be developed, which is costly. In this pap...

Psychometric functions for pulsed pure-tone frequency discrimination were obtained from hearing-impaired listeners at frequencies with normal hearing and at frequencies with mild or moderate hearing losses. The general form of psychometric functions at hearing-impaired frequencies was found to be the same as at normal-hearing frequencies, i.e.,d' was linear with the frequency difference between...

Single-unit recordings conducted during perceptual decision-making tasks have yielded tremendous insights into the neural coding of sensory stimuli. In such experiments, detection or discrimination behavior (the psychometric data) is observed in parallel with spike trains in sensory neurons (the neurometric data). Frequently, candidate neural codes for information read-out are pitted against ea...

The temporal resolution power hypothesis explains individual differences in psychometric intelligence in terms of temporal acuity of the brain. This approach was supported by high correlations between temporal discrimination and psychometric intelligence. Psychometric intelligence, however, was frequently found to be related to non-temporal discrimination (e.g., frequency, intensity, brightness...

INTRODUCTION Impairments in social functioning are associated with an array of adverse outcomes. Social skills measures are commonly used by health professionals to assess and plan the treatment of social skills difficulties. There is a need to comprehensively evaluate the quality of psychometric properties reported across these measures to guide assessment and treatment planning. OBJECTIVE T...