Trial-by-trial auditory brainstem response detection.

Bullying in senior high schools is a pervasive global concern with far-reaching consequences for students’ psychological well-being, academic performance, and school attendance. Bullying is not a trivial or isolated event but a systemic issue that affects students across socioeconomic, cultural, and geographic boundaries. According to the United Nations Educational, Scientific and Cultural Organization, nearly one in three students globally has been bullied by their peers at school at least once in the preceding month. Such behavior undermines the core values of inclusive and equitable education and jeopardizes the ability of schools to serve as safe and nurturing environments. Bullying is generally defined as repetitive and deliberate aggressive behavior involving a power imbalance between the perpetrator and the victim. This imbalance can be physical (e.g., strength or size), social (e.g., popularity or group influence), or psychological (e.g., emotional manipulation), and it is this persistent inequality that makes bullying particularly harmful. Victims often find themselves unable to defend against the aggressor’s actions, leading to feelings of helplessness, fear, and isolation. The manifestations of bullying are multifaceted, ranging from direct forms such as physical aggression (hitting, kicking, pushing) and verbal abuse (teasing, name-calling), to indirect or relational bullying such as social exclusion, rumor-spreading, and public humiliation. In the last two decades, the advent of digital technologies and social media platforms has also given rise to cyberbullying, a form of psychological aggression carried out through electronic means. This includes sending threatening messages, sharing embarrassing photos, or engaging in online harassment, all of which can reach a wide audience and persist indefinitely. Cyberbullying, in particular, blurs the boundaries between school and home, making it difficult for victims to find safe spaces or periods of respite. Bullying thrives in school environments where protective structures are weak, inconsistent, or absent. Schools that lack clear anti-bullying policies, trained personnel, or a supportive culture often fail to detect, report, or address bullying incidents effectively. In such settings, bystanders may be discouraged from intervening, victims may hesitate to report abuse for fear of retaliation, and perpetrators may act with impunity. Furthermore, institutional tolerance whether implicit or explicit can normalize aggressive behavior, erode trust in school authorities, and compromise the overall school climate. In Ghana, the situation is particularly worrying. Studies suggest that between 40 and 56% of senior high school (SHS) students have experienced some form of bullying, either as victims, perpetrators, or bystanders. The 2008 Ghana Global School-based Student Health Survey (GSHS) reported that 40.1% of surveyed students had been bullied at least once in the past 30 days, and victims were nearly twice as likely to miss school compared to their non-bullied peers. This trend continues to be evident in recent surveys, with the 2012 GSHS indicating a bullying prevalence of 41.3%, revealing associations with psychosocial problems such as loneliness, physical fights, injuries, and substance use. The psychological impact of bullying on adolescents cannot be understated. Victims often report higher levels of depression, anxiety, social withdrawal, and suicidal ideation compared to their non-victimized counterparts. Research also shows that chronic exposure to bullying compromises students’ concentration, academic self-efficacy, and motivation, leading to poor academic performance. In Ghanaian studies, psychological distress particularly symptoms of depression and anxiety has been found to be significantly correlated with bullying victimization among senior high school students. Importantly, gender differences play a notable role in both the experience and outcomes of bullying. Female students, for example, are more likely to experience emotional forms of bullying such as social exclusion or rumor-spreading, which can intensify feelings of isolation and emotional distress. In contrast, males are often subjected to physical bullying but may report it less frequently due to social stigma around male vulnerability.