Studyguide PRAXIS audiology ST Questions & 100% Correct Answers | Latest Update | Graded A+

what is the CPT code for comprehensive (air, bone, speech) : 92557 What does sensitivity measure? Specificity? : Sensitivity measures the probability of actual positives specificity measures the probability of actual negatives. What is the formula for sensitivity? : Sensitivity= TP/(TP+FN) What is the formula for specificity? : Specificity = TN/(TN+FP) What is the formula for positive predictive value? 2 | P a g e : PPV = TP/ (TP+FP) What is the formula for negative predictive value? : NPV = TN/(FN+TN) What does ASSR use instead of latency and amplitude? : amplitudes and phases What types of stimuli to measure ASSR : ASSR is evoked using repeated sound stimuli presented at a high repetition rate What methods does ASSR use to detect and define hearing thresholds? : ASSR uses an objective, statistics-based mathematical detection algorithm to detect and define hearing thresholds. What are the pros of using ASSR when compared to ABR? : ASSR can be used binaurally, while evaluating broad bands or four frequencies (500 Hz, 1,000 Hz, 2,000 Hz, and 4,000 Hz) simultaneously. It can estimate and differentiate hearing within the severe-to-profound hearing loss ranges. 3 | P a g e What is the most sensitive measure of CN VIII dysfunction? : ABR Where is ABR measure derived from (big picture) : ABRs are peripheral measures of neural function/ periphery recordings between the cochlea and the inferior colliculus. Where is wave I from (ABR) : Distal (peripheral portion) of the cochlear nerve Where is wave II from (ABR) : Proximal (more central) part of the cochlear nerve Where is wave III from (ABR) : cochlear nucleus Where is wave IV from (ABR) : SOC Where is wave V from (ABR) : Nuclei of the lateral lemniscus 4 | P a g e Where is wave VI from (ABR) : inferior colliculus What is the optimal stim rate for ABR? : 11-21 In ABR, increasing the rate will do what to the amplitude and latencies? : Increasing the stimulus rate will decrease amplitude, increase absolute latencies, and prolong I-V wave interpeak