10:30-12:10 | Room 708 Sunday Onsite Presentation Session 1

Health & Psychology

Session Chair: Thamonwan Chukhanhom

10:30-10:55

69220 | Enhancing the Perceived Message Effectiveness of Anti-Smoking Messages: The Role of Message Framing and SelfAffirmation

Eunsung Lee, Sungkyunkwan University, South Korea

Francis Joseph Costello, Sungkyunkwan University, South Korea

The success of a public health campaign predominantly lies in the persuasiveness of a health message. A large body of literature has documented cigarette warning labels as an effective health message, thereby the similar-fashioned anti-smoking messages have been printed on cigarettes for over several decades. However, we still witness a large population under potentially life-threatening risks associated with smoking. In this paper, we evaluated the perceived message effectiveness and the defensive avoidance of cigarette warnings labels to quit smoking using functional nearinfrared spectroscopy. Specifically, this study tested a gain versus loss message framing and a self-affirmation approach on Asians, thereby examining the influence of culture on message persuasiveness. Moreover, neural activities along with self-reported data were analyzed. Participants (N=40) were recruited to participate in the fNIRS experiment. The results show that loss-framed messages were more persuasive than gain-framed messages. Also, gain-framed message group exhibit significantly lower defensive avoidance than loss-framed message group, but the level of defensive avoidance was higher in gain-framed group when they were self-affirmed than they are not. Finally, the level of perceived message effectiveness was higher in gain-framed group when they were self-affirmed, whereas it was almost the same for loss-framed group in both self-affirmed and control conditions. 10:55-11:20

69016 | Reducing Tuberculosis Stigma and Leveraging Knowledge, Attitude and Self-Efficacy Among Thai High-School Students

Saowaluk Moonsarn, Chulalongkorn University, Thailand

Anuchit Phanumartwiwath, Chulalongkorn University, Thailand

Yuthichai Kasetjaroen, Health Department, Bangkok, Thailand

Anne Marie Bettex-Baars, BE Health Association, Switzerland

Background: Tuberculosis (TB) continues to be vital public health problem in Thailand. In addition, assessing TB stigma is that TB infection are indicated to be high among high-school students.

Objectives: To explore the effectiveness of communication intervention on reduction of TB stigma and discrimination among high-school students in Bangkok, Thailand.

Methods: The study was conducted in two high schools with 216 high-school students. A quasi-experimental study design was implemented. Both purposive and systematic sampling techniques were used for select of areas and participants. The experimental group received the communication intervention for a three-month study period, while the control group received no intervention. The intervention was conducted for five months. The questionnaires were collected at baseline, 3 months, and 5 months. All outcomes measurements at baseline, intervention and follow-up periods were evaluated using Generalized Estimating Equations (GEE).

Results: Results showed that the communication program was effective in reducing TB stigma (p-value <0.05, CI=4.962, -1.723) and increasing TB knowledge(p-value <0.05, CI=1.825, 2.537), TB attitudes (p-value <0.05, CI=4.493, 6.280), and self-efficacy on TB stigma and discrimination (p-value 0.05, CI=-1.398, 0.810).

Conclusion: The intervention can be effectively reduced TB stigma and increased TB knowledge and attitudes as well as self-efficacy among high-school students. The study should be adopted in school to make up for the TB knowledge and TB attitudes, and to reduce TB stigma among high-school students.

11:20-11:45

68930 | Does a Positive Suggestion Work Better in Encouraging Positive Eating Behavior?

Thamonwan Chukhanhom, Khon Kaen University, Thailand

Patcharaporn Mahasuweerachai, Khon Kaen University, Thailand

Phumsith Mahasuweerachai, Khon Kaen University, Thailand

Due to the increasing problem of diabetes caused by unhealthy food consumption behavior, countless behavioral science has paid attention to encouraging people to eat healthier foods. Previous studies suggested that framing messages with low and high-construal influences people's food choices, and a sense of power is also found to motivate individuals to change their behavior. Thus, the current study aimed to investigate the effects of healthy messages framed with low and high construal levels combined with a sense of power on people's healthy food choices. In doing so, four-hundred participants were randomly assigned to one of five conditions in the laboratory experiment: i. low-construal level message, ii. the high-construal level message, iii. a low-construal level message with a high sense of power, iv. a high-construal message with a high sense of power, and v. control group (no message frame). Each message was presented in the "thank you”card, which was given to participants in each condition after they completed the activity that did not relate to food. Afterward, participants were asked to choose either healthy brownies or regular ones as a reward for participating in the experiment. The result showed that a low-construal healthy message influenced participants to choose healthy brownies (p<0.05). Unexpectedly, messages with a high construal level and a high sense of power were not shown the effects.

11:45-12:10

69076 | Influence of Accelerometer Position and Algorithm on Evaluated Sleep Parameters

Gulsatar Ali, Yuan Ze University, Taiwan

Jonathon David White, Yuan Ze Univeristy, Taiwan

Sleep disturbances are a public health concern as they have a negative impact on basic life qualities such as memory, focus, and learning (especially in the elderly). While polysomnography (PSG) is the gold standard for evaluating sleep in clinical studies, it is not applicable to freeliving studies. Accelerometry and sleep diaries are the "goto" methods for evaluating sleep in this environment. We investigate the influence of accelerometer placement and two sleep detection algorithms (arm/ankle elevation (AE) or activity index (AI)) on determining sleep parameters. Four accelerators (left arm, right arm, left ankle, and right ankle) were placed on the body of a healthy right-handed male participant for over 70 days. The subject maintained a consistent sleep diary and slept on a pressure-sensitive mattress. For sleep offset, AI processing of ankle (arm) data indicated falsely that the subject was asleep after bed-exit 46% (14%) of the time versus 2% (0%) for AE. This suggests that sensor placement (non-dominant arm) is important for AI but not for AE. Using sleep diary as ground truth, AE, underreported sleep duration by 30 (dominate ankle) to 60 (non-dominate arm) minutes, while AI overreported sleep duration by 10 (non-dominate arm) to 60 (dominate ankle) minutes. This suggests for AE, the sensor can be placed where it is most comfortable for the subject, while for AI, it is crucial to place the sensor on the non-dominant arm. Surprisingly, sleep duration determined by averaging the two algorithms comes very close to that obtained from the sleep diary