Fire drill: Inattentional blindness and amnesia for the location of fire extinguishers
Fire extinguishers can save lives and are placed in locations that make them easily accessible and in plain view in case of an emergency. However, despite having viewed these bright red objects many times, people may be unaware of their precise locations or even of the fact that they have seen them so often in their workplace environment. We tested the ability of occupants of an office building to recall the location of the nearest fire extinguisher, as well as other objects (e.g., clock, drinking fountain). Despite years of exposure to it, a majority failed to remember the location of the nearest fire extinguisher, although they were able to locate it relatively quickly when asked to search for it. The results support an important distinction between seeing and noticing objects and reveal a novel form of inattentional amnesia for salient objects. The study also created an important learning event via failed retrieval, which could be essential to survival.
KeywordsMemory Attention Inattentional blindness Amnesia Fire safety
Do you know where the nearest fire extinguisher is? In a workplace environment, fire extinguishers are placed in locations that make them easily accessible and in plain view, such that they can be quickly located (situated within 75 feet of employees, according to the United States Department of Labor Occupational Safety and Health Administration, 2012). However, despite having viewed these bright red objects many times, people may be unaware of their precise locations or even of the fact that they have seen them so often. In the domain of visual attention and memory, there have been several powerful demonstrations of inattentional blindness, in which people do not see objects when they are directing attention to other locations (Mack & Rock, 1998). Strikingly, Simons and Chabris (1999) have shown that people will often fail to notice a gorilla walk through a scene if they are busy attending to other aspects of the scene. Similarly, Simons and Rensink (2005) have shown demonstrations of change blindness, where people often do not notice a change in a scene, even when this change occurs with previously studied objects that are in the focus of attention. Wolfe (1999) has suggested that inattentional amnesia occurs when people have previously seen the objects in question but do not have a specific memory for having seen these objects, possibly due to a failure of attentional control and interruption in encoding the objects in memory.
Is it possible people really do not notice potentially lifesaving safety devices that are designed to be located in plain view and to be easily accessible? To determine whether this is the case, we conducted a field study of university faculty, staff, and students who had offices in the Psychology Department building (Franz Hall tower) at the University of California, Los Angeles (UCLA). Participants were approached in their offices and were asked whether they knew the location of the nearest fire extinguisher. They were also asked to rate their confidence in knowing the nearest location and were then asked to exit their office and locate the nearest fire extinguisher. We hypothesized that if inattentional amnesia and inefficiencies in visual search influence how we locate and remember objects in real-world settings (e.g., Kingstone, Smilek, Birmingham, Cameraon, & Bischof, 2005; Vo & Wolfe, 2012; Wolfe, Horowitz, & Kenner, 2005; Wolfe, Alvarez, Rosenholtz, & Kuzmova, 2011), then there may be striking instances in which people fail to remember and find the location of the nearest fire extinguisher, a failure of memory that could have important safety implications. In addition, we conducted a follow-up interview approximately 2 months after the initial study, to determine whether participants were able to locate other common objects (floor plan map, clock, drinking fountain, fire alarm) and to determine whether they could accurately remember the location of the previously tested fire extinguisher. We were interested in the degree to which the location of more frequently used objects would be remembered and, in the case of recalling the location of the fire extinguisher, whether the potential failed-retrieval during the initial test might facilitate later retention after a 2-month retention interval.
Participants and locale
Procedure and materials
People were approached while in their office or laboratory and were asked whether they would complete a short survey about building safety. They were then asked whether they specifically knew where the closest fire extinguisher was (yes or no), and how confident they were about knowing the location (on a scale of 0–10, with 10 indicating extremely high confidence). They were then asked to get up and leave their office to find the nearest fire extinguisher. After recording whether they had known exactly where to initially look and whether they found it within a 5–to 10-s range, we then asked whether they had noticed it in this location before (yes or no) and whether they were at all surprised about knowing/not knowing the location, now that they had actually located it. Finally, we asked them how confident they were that they could find the fire extinguisher at some point in the future. Participants were then asked to provide some background information, including age, number of years in this office, and position (faculty, staff, or student). They then were debriefed about the study and were asked whether they had any questions or comments.
Summary of the objects that were tested in the follow-up interview (and the number of objects located on each floor), the mean proportion of people who knew the correct location, mean confidence that they knew the location (0 = low, 10 = high), how frequently they used the object in the past (0 = never, 10 = very often), and the approximate amount of time it took to locate the object (as measured using time ranges of <5 s, 5–10 s, 10–30 s, >30 s) (with standard errors of the means shown in parentheses, where appropriate)
Objects (per floor)
Used in past
Time to find
Floor plan map (3)
Drinking fountain (2)
Fire alarm (2)
Fire extinguisher time 1 (6) (initial session)
Fire extinguisher time 2 (6) (follow-up session)
Results and discussion
Those who answered correctly provided a variety of reasons as to why they knew the location of the nearest fire extinguisher. For example, 3 people who accurately knew the location of the nearest fire extinguisher said that they had viewed it many times and that that was why they knew the location; 3 people had recently taken a laboratory safety training course; and 2 people had some specific memories associated with it (e.g., an unusual chair was always next to it, or they knew someone had hidden a key there in the past). Eight people located a fire extinguisher, but it was not the nearest fire extinguisher to their office (e.g., they initially walked past the nearest fire extinguisher while locating one that was farther away). After being informed that there was, in fact, a closer fire extinguisher, they quickly found it (and were surprised by the location). Several people also remarked that it was probably near the elevator (even if one was much closer), suggesting that sometimes people infer the locations, have a general or “gist-based” notion, or misremember certain aspects, without relying on actual memory for a specific (nearest) location (cf. Bartlett, 1932; Intraub & Richardson, 1989; Loftus, 1992; Wolfe, 1998). In general, many people were initially surprised that they did not know the location of the nearest fire extinguisher, and upon finding it themselves, they were also surprised that they had not noticed it there before (for example, several people asked, “Has it always been there?”). Twelve people remarked that they had “seen” the location before but had not “noticed” the fire extinguisher. This finding is consistent with other work that has shown that simply seeing or hearing information repeatedly does not enhance memory for this information (e.g., Berkerian & Baddeley, 1980; Nickerson & Adams, 1979; Rubin & Kontis, 1983) and that remembering information entails more detailed semantic, analytical, and/or deeper levels of processing for information to enter long-term memory (e.g., Craik & Lockhart, 1972; Craik & Tulving, 1975). However, the present findings are remarkable given that fire extinguishers are bright red, placed in conspicuous locations, and have the potential to be lifesaving devices.
The results from the follow-up interview are shown in Table 1. Overall, people were especially good at remembering the location of other objects (e.g., clocks), even when they reported not using these objects very often (e.g., drinking fountain, floor map). Strikingly, people were especially poor at knowing the location of the fire alarm, with accuracy comparable to that for locating the fire extinguisher. The fire extinguishers were much larger in size and more frequent than the fire alarms (there were six fire extinguishers per floor, vs. two fire alarms per floor). Much like the fire extinguishers, fire alarms are bright red, placed in plain sight, and need to be located rapidly in an emergency but are poorly remembered. Moreover, unlike the fire extinguishers, which were rapidly found despite poor initial memory, participants may not have “seen” or “noticed” the fire alarms, as evidenced by the relatively long search times to locate the fire alarm, relative to other objects, including the fire extinguishers (see Table 1). Finally, after a 2-month retention interval, all participants remembered the location of the nearest fire extinguisher (see also Vo & Wolfe, 2012), suggesting that the earlier failed retrieval (and/or self-revelation that they did or did not know the location of the nearest fire extinguisher) served as an effective intervention that enhanced later memory for these lifesaving devices.
The present study showed that a large number of people failed to remember the location of the nearest fire extinguisher despite years of exposure to it, yet were able to locate a fire extinguisher fairly quickly and, in the follow-up session, could accurately remember the location of the nearest fire extinguisher 2 months later. The ability to locate these objects might reflect mechanisms of attentional priority and goal-directed attention (e.g., Castel, McGillivray, & Friedman, 2012; Yantis & Johnson, 1990). Although people may not remember the location of the nearest fire extinguisher, they can locate a bright red object when this becomes goal relevant (hopefully, in the case of a real fire). It may be that when goals become activated, people can execute action-specific programs (e.g., Cañal-Bruland & van der Kamp, 2009) that enable them to locate a previously unnoticed fire extinguisher. However, in the event of a fire, environmental and internal conditions (e.g., smoke in a hallway, anxiety, and stress), could potentially compromise perceptual and goal-relevant cognitive operations (cf., Vendetti, Knowlton, & Holyoak, 2012), such that the person would need to rely on memory to find a fire extinguisher. The poor recall might also reflect failures of associative memory, since people know they have seen a fire extinguisher somewhere on their floor but have trouble remembering (and/or misremembering) the precise location with the object in question. Future work could examine whether people can both remember and locate emergency eyewash stations (especially in laboratory settings), since this may prove to be even more critical when vision is compromised, something that can easily happen when chemicals enter the eye. Given the findings of the present study, even when people have uncompromised vision, they often are not aware of the nearest location of a safety device. Our findings may also be relevant in highly stressful situations, such as finding an emergency exit on an airplane. Training protocols should consider that often people may encode information during training yet may not have immediate access to it when they need to spontaneously recall important information, possibly due to lack of attention during encoding, poor incidental learning, or rapid forgetting. Consistent with this possibility, the Federal Aviation Administration requires that, on flights longer than 4 h, passengers be reminded of the location of emergency exits prior to landing.
The present findings emphasize the need for more work that assesses how cognitive processes function in complex, real-word settings, providing what can be considered a complementary approach for studying human cognition, one that has been referred to as cognitive ethology (e.g., Kingstone et al., 2005; Kingstone et al., 2003; Smilek, Eastwood, Reynolds, & Kingstone, 2007). This approach emphasizes the observation and description of human behavior, as well as the personal and subjective reports that often accompany people’s behavior (including their successes and failures), since people engage in tasks in real-world situations. In addition, the present “field study” also offers a relatively simple but powerful form of intervention training that may enhance memory for the nearest fire extinguisher. Specifically, participants in the initial session engaged in a form of errorful learning, often failing to know the location of the nearest fire extinguisher, but then finding it, which likely enhanced memory when tested in the 2-month follow-up. This form of initial failed retrieval and retrieval practice (e.g., Bjork, 1994; Karpicke & Roediger, 2008; Kornell, Hayes, & Bjork, 2009; McGillivray & Castel, 2010) could allow for the potent formation of an episodic memory (cf. Tulving, 1983) for the location of the fire extinguisher, thus acquiring information that could potentially prove to be lifesaving in the event of a fire. Participants in the follow-up interview all reported remembering having to find the fire extinguisher 2 months prior, suggesting that this initial “fire extinguisher drill” can enhance later memory. Similarly, recent work suggests that survival processing can enhance memory (e.g., Nairne & Pandeirada, 2010) and that memory can and should be tuned to adaptive survival mechanisms, such as remembering the location of a lifesaving object. Asking people to search for a survival-relevant object during training may enhance the likelihood of finding this object during an actual fire. The present study demonstrates a form of inattentional blindness and amnesia for highly visible objects that, while not goal-relevant on a day-to-day basis, could potentially be essential to survival in an emergency.
This study was supported by ONR Grant N000140810186. We thank Airom Bleicher, Sabrina Lux, and Nicole Foley for help with data collection and Robert Bjork, Jacques Cerf, Michael Dodd, Barbara Knowlton, and Zili Liu for helpful comments.