Behavioral Safety and Human Performance Factors Flashcards

A tree care crew has successfully worked under high-voltage lines dozens of times without incident. Over time, the crew begins to reduce their pre-job briefing time and skip some PPE steps. This pattern is best described as which safety concept?

Answer: Normalization of deviance

Normalization of deviance occurs when repeated exposure to a risk without negative consequence causes a crew to gradually accept unsafe behavior as 'normal.' The absence of prior incidents falsely signals that the deviation is safe, eroding the safety culture that previously prevented harm.

According to behavioral safety principles, which type of consequence is MOST effective at reinforcing safe behavior in tree care workers?

Answer: Certain, immediate, and positive consequences

Behavioral safety research shows that consequences that are certain (will definitely happen), immediate (occur right away), and positive (something the worker values) most powerfully shape behavior. This is why discipline alone — which is typically delayed and negative — is less effective at changing behavior than positive reinforcement applied consistently.

A safety leader conducts a behavioral observation and sees a worker NOT wearing eye protection while bucking logs. What is the FIRST recommended action based on behavioral safety methodology?

Answer: Approach the worker privately, acknowledge good practices observed, then raise the specific concern

Behavioral observation programs emphasize a coaching conversation rather than punitive responses. Effective observers acknowledge positive behaviors first to establish a respectful tone, then address the specific unsafe act, discuss why the PPE is important, and confirm the worker's understanding — all without shaming or punishing.

Which human error type is most common in experienced tree care workers performing familiar, routine tasks?

Answer: Slips and lapses (skill-based errors) caused by inattention during automatic behavior

Experienced workers performing routine tasks operate largely on autopilot (skill-based behavior). Slips and lapses — unintended deviations during otherwise automatic actions, such as grabbing a running chainsaw blade or forgetting to set a brake — are the most common error type for this population. This is why complacency is a primary concern for experienced crews.

What is the primary goal of a Behavior-Based Safety (BBS) observation program in a tree care company?

Answer: To shift safety culture from reactive (incident-driven) to proactive (behavior-driven) through peer feedback and data collection

A BBS program uses structured peer observations to identify at-risk behaviors before they cause harm. The data collected reveals patterns in the work environment or culture that produce unsafe behavior, enabling proactive interventions. The program's success depends on a non-punitive, trust-based culture where observation is seen as coaching, not surveillance.

A crew member consistently bypasses a safety guard on a stump grinder because 'it slows me down.' This behavior is classified as which type of human error in behavioral safety models?

Answer: A violation — an intentional deviation from a rule or procedure

A violation is a deliberate deviation from a known rule, standard, or procedure — as opposed to slips, lapses, and mistakes, which are unintentional. Violations require different interventions than errors: addressing the worker's perception of risk, the barriers making compliance difficult, and the culture that tolerates the deviation.