Behavioral Psychology and Physiology

Research in facial expression psychology has shown that smiling is indeed the most frequently used facial expression across human cultures. It serves as a universal social signal for friendliness, agreement, and approachability. The smile requires fewer muscles than frowning and is socially encouraged from childhood, making it our most common facial expression.

Good posture at a computer includes keeping your back straight, eyes on the monitor at proper height, and feet flat on the floor. Resting elbows on the table is NOT good ergonomic practice as it can cause strain and restrict circulation.

All three behaviors (yawning without covering, slouching, nail-biting) are considered unprofessional in American workplace culture. They signal boredom, lack of engagement, or poor hygiene awareness, undermining your professional image.

All three behaviors project engagement and professionalism in American culture. Open posture appears approachable, smiling signals friendliness, and leaning forward shows active listening. These positive cues build rapport in professional settings.

Atavism refers to the tendency to revert to ancestral type, or the reappearance of a characteristic that had disappeared generations earlier. It describes a resemblance to remote ancestors rather than immediate parents. Option A is correct.

Encroachment is a gradual intrusion or advance into territory or rights belonging to others, often implying unauthorized entry. The other options are unrelated: B means cessation, C means veracity, D means concatenate.

To habituate is to make someone or something used to something; to accustom. A gust (488955) is wind, stifle (488956) is to hold back, and galvanize (488958) is to shock. Accustom is the correct synonym.

Continuous gaze is a sign of attentive body language because it shows the listener is focused on the speaker and actively engaged in the conversation. Stooped shoulders suggest poor posture or lack of confidence, crossed legs can indicate a closed or defensive attitude, and eyes down often signal discomfort or submissiveness rather than attentiveness.

A palm-down handshake shows dominance because it positions your hand above the other person's hand, which is a subtle way of establishing control in the interaction. A firm handshake is generally confident, timid shows insecurity, and the duration (short vs long) doesn't directly convey dominance the way palm orientation does.

Clenching fists is a sign of aggressive body language because it physically shows tension and preparation for confrontation. Closed body language is more about defensive postures like crossed arms, while open body language involves exposed palms and relaxed posture. Relaxed body language would show no tension, not the tight grip of clenched fists.

Legs crossed, folded arms, and eyes down are signs of closed body language because they create physical barriers and reduce openness to interaction. These defensive postures signal discomfort, resistance, or lack of receptivity. Open body language would involve uncrossed limbs and more exposed posture, while aggressive language would show threat indicators like clenched fists.

Crossed arms is a classic closed body language signal that indicates defensiveness, resistance, or discomfort. Crossed legs can also signal closed attitude but arms are more universally recognized as the primary closed posture indicator. Head movement and eye contact are generally open signals.

Funicular means operated or moved by a cable - like a funicular railway. Option A is correct. The term describes cable-powered systems, often on steep inclines. Other options refer to dance (B), play (C), or insect parts (D).

Doxology is a hymn or expression of praise to God, typically short and used in Christian worship services. Option C correctly identifies this religious term. The other options describe deontology (ethics), sign language, and dendrology - completely unrelated concepts.

Good posture includes back straight, eyes properly positioned on monitor, and feet flat on the floor. Elbows should be at 90 degrees with arms resting naturally - placing elbows ON the table is poor ergonomics and can cause strain, making it the exception.