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- Genre: Masters Thesis
- Creators: Arizona State University
- Creators: Chakraborty, Bijeta
- Member of: ASU Electronic Theses and Dissertations
Description
This study examined the relationship that gender in interaction with interpersonal problem type has with outcome in psychotherapy. A sample of 200 individuals, who sought psychotherapy at a counselor training facility, completed the Outcome Questionnaire-45(OQ-45) and the reduced version of the Inventory of Interpersonal Problems (IIP-32). This study was aimed at examining whether gender (male and female), was related to treatment outcome, and whether this relationship was moderated by two interpersonal distress dimensions: dominance and affiliation. A hierarchical regression analyses was performed and indicated that gender did not predict psychotherapy treatment outcome, and neither dominance nor affiliation were moderators of the relationship between gender and outcome in psychotherapy.
ContributorsHoffmann, Nicole (Author) / Tracey, Terence (Thesis advisor) / Kinnier, Richard (Committee member) / Homer, Judith (Committee member) / Arizona State University (Publisher)
Created2013
Description
This study examined the relationship of client pretreatment interpersonal problems (measured by the Inventory of Interpersonal Problems) to the therapeutic alliance (as measured early in treatment by a self report version of the Working Alliance Inventory‐ Short) using multilevel modeling to account for client and counselor variables. Specifically, the correlations of dominance, hostility and cold/distance interpersonal problems with the initial working alliance were investigated. Participants consisted of 144 clients and 44 graduate student counselors at the Counselor Training Center at Arizona State University. The intraclass value of .23 indicated there is a sizable effect, with counselor differences accounting for 23% of the variance in client alliance ratings, supporting the use of multilevel modeling. There was a dominance counselor gender interaction with working alliance scores. Clients who had problems with dominance reported higher working alliance scores with male counselors while clients who had problems with submissiveness reported higher working alliance scores with female counselors. Hostile dominance interpersonal problems were associated with lower initial working alliance scores regardless of counselor gender. Implications for clinical practice are discussed.
ContributorsKrieg, Christina (Author) / Tracey, Terence (Thesis advisor) / Kurpius, Sharon (Committee member) / Glidden-Tracey, Cynthia (Committee member) / Arizona State University (Publisher)
Created2012
Description
Efficiency of components is an ever increasing area of importance to portable applications, where a finite battery means finite operating time. Higher efficiency devices need to be designed that don't compromise on the performance that the consumer has come to expect. Class D amplifiers deliver on the goal of increased efficiency, but at the cost of distortion. Class AB amplifiers have low efficiency, but high linearity. By modulating the supply voltage of a Class AB amplifier to make a Class H amplifier, the efficiency can increase while still maintaining the Class AB level of linearity. A 92dB Power Supply Rejection Ratio (PSRR) Class AB amplifier and a Class H amplifier were designed in a 0.24um process for portable audio applications. Using a multiphase buck converter increased the efficiency of the Class H amplifier while still maintaining a fast response time to respond to audio frequencies. The Class H amplifier had an efficiency above the Class AB amplifier by 5-7% from 5-30mW of output power without affecting the total harmonic distortion (THD) at the design specifications. The Class H amplifier design met all design specifications and showed performance comparable to the designed Class AB amplifier across 1kHz-20kHz and 0.01mW-30mW. The Class H design was able to output 30mW into 16Ohms without any increase in THD. This design shows that Class H amplifiers merit more research into their potential for increasing efficiency of audio amplifiers and that even simple designs can give significant increases in efficiency without compromising linearity.
ContributorsPeterson, Cory (Author) / Bakkaloglu, Bertan (Thesis advisor) / Barnaby, Hugh (Committee member) / Kiaei, Sayfe (Committee member) / Arizona State University (Publisher)
Created2013
Description
The goal of the present study was to test for links between experiences of red flags in initial interactions with romantic partners and later styles of relational conflict. Red flags are negative qualities or traits displayed by a potential romantic partner that trigger warnings in singles of possible future negative experiences if a romantic relationship develops. I focused on five red flags (displayed a lack of interest, evidenced narcissistic-like behavior, was too sexual, too possessive, or drank too much) and three conflict styles (mutual constructive style, demand/withdraw style, mutual avoidance style) in the current study. The 155 unmarried male undergraduates and the 504 unmarried female undergraduates were asked to refer back to their most recent dating partner when completing these relationship measures. The red flag measures, therefore, were measured using a retrospective approach. After controlling for whether the singles were still in their relationships and the sex of the participants, regression analyses revealed that recalling that one's partner showed a lack of interest in initial interactions were significantly and positively associated with a demand/withdraw and mutual avoidant conflict style. Results also showed that recalling that one's partner was too possessive in initial interactions was significantly and negatively associated with a mutual constructive conflict style, and positively related to partner demand/I withdraw and mutual avoidant conflict styles. Finally, recalling that their partner drank too much in a first interaction was negatively linked to later reports of engaging in a mutually constructive conflict style. This study provides insight into an area of research that has not been previously studied.
ContributorsPorter, Cami (Author) / Christopher, F (Thesis advisor) / Iida, Masumi (Committee member) / Guerrero, Laura (Committee member) / Arizona State University (Publisher)
Created2014
Description
This work analyzed the role of interpersonal problems in interaction with ethnicity to predict psychotherapy outcome. A total of 262 individuals, who underwent psychotherapy at a counseling training facility, completed the Outcome Questionnaire-45 (OQ-45) and the reduced version of the Inventory of Interpersonal Problems (IIP-32). This study posited the following research question: Is the magnitude of the effect of ethnicity on treatment outcome conditional on certain IP dimensions (dominance or affiliation)? The purpose of this research was to determine whether or not ethnicity, represented by 3 ethnic groups (Whites, Hispanics, and Asians), was related to treatment outcome, and if this relationship was moderated by two interpersonal distress dimensions: dominance and affiliation. The results of the hierarchical regression analyses indicated that ethnicity did not predict post-treatment outcome gain, and neither affiliation nor dominance was a moderator of the relationship between outcome and ethnicity.
ContributorsJimenez Arista, Laura E (Thesis advisor) / Tracey, Terence (Committee member) / Kinnier, Richard (Committee member) / Claiborn, Charles (Committee member) / Arizona State University (Publisher)
Created2011
Description
Class D Amplifiers are widely used in portable systems such as mobile phones to achieve high efficiency. The demands of portable electronics for low power consumption to extend battery life and reduce heat dissipation mandate efficient, high-performance audio amplifiers. The high efficiency of Class D amplifiers (CDAs) makes them particularly attractive for portable applications. The Digital class D amplifier is an interesting solution to increase the efficiency of embedded systems. However, this solution is not good enough in terms of PWM stage linearity and power supply rejection. An efficient control is needed to correct the error sources in order to get a high fidelity sound quality in the whole audio range of frequencies. A fundamental analysis on various error sources due to non idealities in the power stage have been discussed here with key focus on Power supply perturbations driving the Power stage of a Class D Audio Amplifier. Two types of closed loop Digital Class D architecture for PSRR improvement have been proposed and modeled. Double sided uniform sampling modulation has been used. One of the architecture uses feedback around the power stage and the second architecture uses feedback into digital domain. Simulation & experimental results confirm that the closed loop PSRR & PS-IMD improve by around 30-40 dB and 25 dB respectively.
ContributorsChakraborty, Bijeta (Author) / Bakkaloglu, Bertan (Thesis advisor) / Garrity, Douglas (Committee member) / Ozev, Sule (Committee member) / Arizona State University (Publisher)
Created2012
Description
In this thesis, a digital input class D audio amplifier system which has the ability
to reject the power supply noise and nonlinearly of the output stage is presented. The main digital class D feed-forward path is using the fully-digital sigma-delta PWM open loop topology. Feedback loop is used to suppress the power supply noise and harmonic distortions. The design is using global foundry 0.18um technology.
Based on simulation, the power supply rejection at 200Hz is about -49dB with
81dB dynamic range and -70dB THD+N. The full scale output power can reach as high as 27mW and still keep minimum -68dB THD+N. The system efficiency at full scale is about 82%.
to reject the power supply noise and nonlinearly of the output stage is presented. The main digital class D feed-forward path is using the fully-digital sigma-delta PWM open loop topology. Feedback loop is used to suppress the power supply noise and harmonic distortions. The design is using global foundry 0.18um technology.
Based on simulation, the power supply rejection at 200Hz is about -49dB with
81dB dynamic range and -70dB THD+N. The full scale output power can reach as high as 27mW and still keep minimum -68dB THD+N. The system efficiency at full scale is about 82%.
ContributorsBai, Jing (Author) / Bakkaloglu, Bertan (Thesis advisor) / Arizona State University (Publisher)
Created2015