Validation of the Short Form of the Mood Instability Questionnaire-Trait (MIQ-T-SF) in the Korean General Population

Objective@#Mood instability (MI) is a clinically significant trait associated with psychiatric disorders. However, there are no concise measurements to evaluate MI. The initial Mood Instability Questionnaire-Trait (MIQ-T) was developed to fill this gap. The current study aimed to create a short form of MIQ-T (MIQ-T-SF) that measures MI with high validity and reliability in the Korean general population. @*Methods@#Of the 59 items in the MIQ-T, 17 items were chosen for the MIQ-T-SF following the factor analysis process. In total, 540 participants completed the MIQ-T-SF. Cronbach’s alpha and McDonald’s omega were used to evaluate reliability. Exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were used to determine construct validity. Concurrent validity was confirmed via comparisons with Personality Assessment Inventory-Borderline Features Scale. Measurement invariance across gender and age groups was confirmed before analyzing differences in scores using Kruskal-Wallis test. @*Results@#The MIQ-T-SF displayed expected correlations and high internal consistency (α=0.71–0.90, Ωt=0.72–0.92). Using EFA and CFA, a five-factor structure was confirmed. Measurement invariance was supported, and gender differences were observed. @*Conclusion@#The MIQ-T-SF is an accurate and reliable method to detect MI in the Korean general population. The study’s results offer new perspectives for future studies on MI.

Better Understanding of Direct Bone-Conduction Measurement:Comparison with Frequency-Specific Bone-Conduction Tonesand Brainstem Responses

The present study aimed to compare thresholds of directbone-conduction (BC direct) with those of behaviorally measured BC pure-tone audiometry(PTA) and objectively measured BC auditory brainstem response (ABR) to confirm the clinicalfeasibility of their relationships. Subjects and Methods: Young adults with normal hearingparticipated in the study to determine the thresholds from three measurements at four testingfrequencies. In the BC direct, the vibrator of a bone-anchored hearing aid softband wasplaced on the right mastoid of each subject. In both PTA and ABR, a B71 bone oscillatorwas placed on the subject’s right mastoid. While the subject’s thresholds of BC direct andBC PTA were determined with a clinically routine 5-dB step procedure, BC ABR was conductedto determine the individual’s hearing sensitivity by a peak V of the waveform usingtone-burst and click stimuli. Results: The BC direct showed a different pattern between lowand high frequencies. Precisely, its thresholds were 13.25 and 12.25 dB HL at 0.5 and 1kHz, respectively, but 19 and 19.75 dB HL at 2 and 4 kHz, respectively. A significant positivecorrelation existed between BC direct and PTA at 1 kHz, which was also correlated withABR. Conclusions: Based on the current data, the thresholds of BC direct were similar toBC PTA at low frequencies and BC ABR at high frequencies. The thresholds of BC directmight be predictable at approximately 5 dB higher (or lower) than that in PTA, although alarge data set is required for standardization. J Audiol Otol 2020;24(2):85-90

Establishment of Normative Data for Auditory Brainstem Responses in White Noise Condition / 대한이비인후과학회지

Background and Objectives@#Recently, researchers have been interested in auditory brainstem response (ABR) under noisy condition for better diagnosis of the hidden hearing loss. However, there is no normative data conducted from a simple noise condition for the clinical setting yet. The purpose of the present study was to compare the data of ABR under quiet condition with those under noisy conditions and to confirm the feasibility of these data in the clinic.Subjects and Method A total of 104 young listeners with normal hearing (53 female and 51 male) participated. After completing the hearing screening tests, they were given the ABR measure with 75 dB nHL click stimulus under quiet condition, and with a level of 85 dB nHL white noise via a speaker. Absolute latencies and amplitudes of the waves were statistically compared against test condition and gender. @*Results@#There was a significant difference of the latency and amplitude between the quiet and noisy conditions. Under the noise, the absolute latencies of the waves I-V were delayed, and their amplitudes were smaller compared to the quiet condition. Such patterns were revealed in both female and male subjects. However, the females had shorter latencies and larger amplitudes than the male participants regardless of noise. @*Conclusion@#We confirmed stable ABR data using simple white noise setting. In the following study, patients with various pathologies should be applied for the ABR under noisy condition and have their data standardized according to sensitivity and specificity.