class review questions

Question 1

PBmax

Answer 1

highest percent correct score
-the best they can do

Question 2

what are the 3 components of evidence based practice?

Answer 2

client perspective, clinical experience and external scientific evidence

Question 3

word recognition score (WRS)

Answer 3

percent correct of a given word list at a supra threshold level
-PBmax, discrimination
-presented above threhsold

Question 4

how are WRS used diagnostically?

Answer 4

site of lesion testing (cochlear vs. retrocochlear) and can compare over time
-only if tested correctly

Question 5

how are WRS used for treatment?

Answer 5

sense of the impact of hearing loss on speech understanding, monaural vs. binaural amplification, unaided vs. aided, and CI candidacy

Question 6

speech materials for WR testing

Answer 6

single words (monosyllabic)
-phonetically balanced
-often with carrier phase
-homogeneous
-closed or open set

Question 7

what does it mean to say a word list is phonetically balanced?

Answer 7

the word list encompasses all the sounds of language

Question 8

closed set vs. open set

Answer 8

closed set - choices are limited, single digits, familiarized
open set - choices are one of many words with no context, not familiar, single syllable words

Question 9

what type of set is easier (meaning there is a higher percent correct score)?

Answer 9

closed set

Question 10

how is a word recognition test administered ?

Question 11

how to determine the starting level for WRS

Question 12

what is the highest level we will present for WRS

Answer 12

100 dB
-if exceeds this, we find UCL and present 5 below that number
-if it comes in at 100, check to see if too loud and if it is bump off 5

Question 13

why is a word recognition test not a test of communicative function?

Answer 13

overestimate
underestimate

Question 14

how does a speakers voice affect WRS?

Answer 14

better scores with male voices than female voices
-within lab setting

Question 15

what does it mean when we say we are concerned about variability for WRS?

Answer 15

we want to make sure our scores are reliable
-if they are highly variable that is not useful

Question 16

how does decreasing the size of the word list increase variability?

Answer 16

the shorter the word list, the greater the variability (decreased reliability)

Question 17

regardless of word list size, which of the following has greater or less variability : 0, 44, 60, 100%?

Answer 17

44% and 60% have greater variability ; 0 and 100 have less variability

Question 18

how is the rollover index (RI) calculated

Answer 18

RI = (PBmax - PBmin) / PBmax

Question 19

what is a significant rollover index?

Answer 19

greater than .25

Question 20

what does a a high or low rollover index tell us?

Answer 20

low : tell’s us NH, CHL, SNHL (cochlear)
high : tell’s us retrocochlear

Question 21

what is a quick way to screen for rollover?

Question 22

why is a single-level percent correct score a weak indicator of a retrocochlear parthology?

Answer 22

it is using 1 ear at 1 level

Question 24

what type of testing does immittance testing encompass

Answer 24

tympanometry, ear canal volume measurement, acoustic reflex testing and eustachian tube function tests

Question 25

what structures are assessed using immittance measures

Answer 25

tympanic membrane, middle ear space (including ossicles) and middle ear reflex (ME, cochlea, auditory nerve, brainstem pathways, facial nerve)

Question 26

what are the components of an immittance meter

Answer 26

probe/probe tip, probe signal generator, microphone and air pressure signal

Question 27

how is immittance testing conducted

Answer 27

based on the idea that changing the pressure in the ear canal and measuring sound levels within the canal

Question 28

what is tympapnometric peak pressure measuring? will it shift along the x or y axis? adult norms? which structure will affect this measurement if not functioning properly?

Answer 28

-measuring the pressure point where the middle ear system is most efficient
-will shift right or left (X)
-(-100) to +50
-eustachian tube function

Question 29

what is static admittance measuring? will this shift along the x or y axis? adult norms? which structure will affect this measurement if not functioning properly?

Answer 29

• measuring stiffness vs. floppiness of the system
  -will shift up or down (Y)
  -0.3 to 1.7
  -ossicular chain and the tympanic membrane function

Question 30

what is ear canal volume measuring? what affects this measure? what are adult norms for ear canal volume?

Question 31

what is tymapnogram width? what are adult norms for tymapnogram width? what is one condition that would likely result in an abnormally large tymapnogram width?

Question 32

which muscle is involved with MEMR in humans?

Answer 32

stapedius muscle

Question 32

what are the two clinical uses of the MEMR/ASR?

Answer 32

cross check of behavioral testing and to differentiate site of lesion

Question 33

parts of the stapedial reflex pathway

Answer 33

middle ear, cochlea, 8th nerve,
brainstem (VCN, MSO), CN 7

Question 34

what measurement from the tympanogram changes in the ASR?

Answer 34

peak admittance

Question 35

what is the minimum amount of change in this measurement that would be considered a reflex?

Answer 35

0.02
-this is the minimum amount, so anything greater than or equal to this
-we want to be the closest we can to this number

Question 36

what are the 5 criteria for a reflex?

Answer 36

lowest level for change (0.02), time locked to stimulus onset, replicability, growth, reflex is stronger the further you go above threshold, decrease in admittance and these things can be achieved in any order

Question 37

how is the test administered?

Answer 37

-do tymp first
-present around 80 dB HL, increase in 5 dB steps as needed until you get an admittance greater than or equal to 0.02
-check for replicability
-increase an additional 5 dB to check for growth

Question 38

what is considered a normal ASR?

Answer 38

70-90 dB