Matching Items (3)
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- All Subjects: Taste
- All Subjects: Mexican American women
- Genre: Doctoral Dissertation
- Creators: Robinson-Kurpius, Sharon
- Creators: Capaldi Phillips, Elizabeth D
Description
The unpleasant bitter taste found in many nutritious vegetables may deter their consumption. While bitterness suppression by prototypical tastants is well-studied in the chemical and pharmacological fields, mechanisms to reduce the bitterness of foods such as vegetables remain to be elucidated. Here tastants representing the taste primaries of salty and sweet were investigated as potential bitterness suppressors of three types of Brassicaceae vegetables. The secondary aim of these studies was to determine whether the bitter masking agents were differentially effective for bitter-sensitive and bitter-insensitive individuals. In all experiments, participants rated vegetables plain and with the addition of tastants. In Experiments 1-3, sucrose and NNS suppressed the bitterness of broccoli, Brussels sprouts, and cauliflower, whereas NaCl did not. Varying concentrations of NaCl and sucrose were introduced in Experiment 4 to assess the dose-dependency of the effects. While sucrose was a robust bitterness suppressor, NaCl suppressed bitterness only for participants who perceived the plain Brussels sprouts as highly bitter. Experiment 5, through the implementation of a rigorous control condition, determined that some but not all of this effect can be accounted for by regression to the mean. Individual variability in taste perception as determined by sampling of aqueous bitter, salty, and sweet solutions did not influence the degree of suppression by NaCl or sucrose. Consumption of vegetables is deterred by their bitter taste. Utilizing tastants to mask bitterness, a technique that preserves endogenous nutrients, can circumvent this issue. Sucrose is a robust bitter suppressor whereas the efficacy of NaCl is dependent upon bitterness perception of the plain vegetables.
ContributorsWilkie, Lynn Melissa (Author) / Capaldi Phillips, Elizabeth D (Thesis advisor) / Cohen, Adam (Committee member) / Johnston, Carol (Committee member) / Sanabria, Federico (Committee member) / Arizona State University (Publisher)
Created2014
Description
Given the continued increase in obesity rates in the United States, there has been growing research regarding factors related to obesity. Researchers have examined biological factors, such as set point theory, as well as various psychological factors such as motivation, self-efficacy, and eating styles. Taster-type, defined as how an individual experiences the perception of taste (particularly bitterness), is a recent area of research that has explored the potential relationship between this phenomenon and obesity. The current study examined whether taster-type impacted weight loss, along with secondary measures of BMI, waist circumference, and food neophobia, as well as taster-type’s impact on these measures over time. This study also examined the potential role of taster-type as a predictor of weight loss, independent of the psychological variables of motivation, self-efficacy, and eating styles. Ninety adult participants, consisting of 64 females and 19 males were recruited for this study. They were asked to diet for four weeks; 60 finished the full four weeks and completed psychosocial measures over two time periods. They were asked to record their food using an online food journal, attend weekly meetings for weigh-ins, and were given psychoeducational materials regarding factors affecting weight loss. The results indicated that taster-type was not a significant factor in BMI or waist circumference, but taster-type did interact with time to reveal that supertasters consistently lost weight across the four week dieting period while nontasters leveled off after Week 2. Additionally, both groups increased in food neophobia from the start of the dieting period to the end of Week 4. Consistent with previous research, motivation and self-efficacy predicted weight loss; however, taster-type did not increase the prediction of weight loss across the dieting period. This effect only occurred at Week 2. By Week 4, no psychosocial variables were significant predictors of weight loss.
ContributorsWagner, Melissa C (Author) / Robinson-Kurpius, Sharon (Thesis advisor) / Capaldi Phillips, Elizabeth (Committee member) / Homer, Judith (Committee member) / Arizona State University (Publisher)
Created2016
Description
ABSTRACT
While the cross-cultural literature on body dissatisfaction among Mexican and Mexican-American women has continued to grow, the traditional Latino female gender role of marianismo, sociocultural factors related to ethnic culture and mainstream/American culture ideal perceived discrepancies in body size, and one’s romantic relationship have not been explored with this population in relationship to body satisfaction. The current study included 227 female participants predominantly from a large southwestern university in the United States and a large university in northern Mexico. The study examined differences in marianismo and body satisfaction between 120 Mexican and 107 Mexican-American women, investigated the role of marianismo as a mediator between weight-related teasing and body satisfaction, and explored the relationship between marianismo, Partner Ideal Discrepancy, Ethnic Culture Ideal Discrepancy, Mainstream/American Culture Ideal Discrepancy, Perceived Weight-Related Criticism/Teasing, Relationship Support, Relationship Depth, and Relationship Conflict to overall body satisfaction. Results indicated Mexican-American women endorsed less overall body satisfaction than did their Mexican counterparts suggesting that Mexican American women may be more influenced by societal messages about thinness and beauty than are Mexican women. The findings also revealed a possible trend for marianismo as a mediator between weight-related criticism and body satisfaction. Marianismo and weight-related teasing were found to have a negative relationship with body satisfaction. Multiple regression analyses revealed that Partner Ideal and Mainstream/American Culture Ideal discrepancies accounted for significant variance in body satisfaction. Relationship Conflict accounted for a smaller but still significant amount of the variance in body satisfaction. Ethnic Culture Discrepancy, Relationship Support, and Relationship Depth were not significant predictors. These findings from this study suggest that both cultural variables and romantic relationship variables are related to the body image of Mexican American and Mexican women. These findings have important implications for the adaptation of current etiological models explaining body satisfaction among Mexican and Mexican-American women as well as highlighting the need to consider the role of both cultural and relationship variables in designing clinical interventions for Mexican American and Mexican women coping with body image concerns.
While the cross-cultural literature on body dissatisfaction among Mexican and Mexican-American women has continued to grow, the traditional Latino female gender role of marianismo, sociocultural factors related to ethnic culture and mainstream/American culture ideal perceived discrepancies in body size, and one’s romantic relationship have not been explored with this population in relationship to body satisfaction. The current study included 227 female participants predominantly from a large southwestern university in the United States and a large university in northern Mexico. The study examined differences in marianismo and body satisfaction between 120 Mexican and 107 Mexican-American women, investigated the role of marianismo as a mediator between weight-related teasing and body satisfaction, and explored the relationship between marianismo, Partner Ideal Discrepancy, Ethnic Culture Ideal Discrepancy, Mainstream/American Culture Ideal Discrepancy, Perceived Weight-Related Criticism/Teasing, Relationship Support, Relationship Depth, and Relationship Conflict to overall body satisfaction. Results indicated Mexican-American women endorsed less overall body satisfaction than did their Mexican counterparts suggesting that Mexican American women may be more influenced by societal messages about thinness and beauty than are Mexican women. The findings also revealed a possible trend for marianismo as a mediator between weight-related criticism and body satisfaction. Marianismo and weight-related teasing were found to have a negative relationship with body satisfaction. Multiple regression analyses revealed that Partner Ideal and Mainstream/American Culture Ideal discrepancies accounted for significant variance in body satisfaction. Relationship Conflict accounted for a smaller but still significant amount of the variance in body satisfaction. Ethnic Culture Discrepancy, Relationship Support, and Relationship Depth were not significant predictors. These findings from this study suggest that both cultural variables and romantic relationship variables are related to the body image of Mexican American and Mexican women. These findings have important implications for the adaptation of current etiological models explaining body satisfaction among Mexican and Mexican-American women as well as highlighting the need to consider the role of both cultural and relationship variables in designing clinical interventions for Mexican American and Mexican women coping with body image concerns.
ContributorsFelix, Vitae (Author) / Robinson-Kurpius, Sharon (Thesis advisor) / Arciniega, Miguel G (Committee member) / Kinnier, Richard (Committee member) / Arizona State University (Publisher)
Created2015