## 3 Results and Analysis  
### Overview of Included Literature  
Twenty studies met the inclusion criteria and were included in this review (Table 1). The most common reason for exclusion was that studies were not based on actual retail environments (Figure 1), although it should be mentioned that most papers included laboratory-based assessments in addition to the actual retailing environment (e.g., [27; 29]), usually to isolate causal mechanisms and/or to document the perceptual properties of the target odors in controlled conditions. In such cases, only the results involving actual retail environments were included for the in-depth review. All studies but two [27; 37] included a control (without scent) condition, so that the effect of adding a scent could be benchmarked against the usual (odorless) store environment. Regardless of whether or not a control condition was included, most papers tested two distinct scents so as to test the effects of both the mere presence of a scent and its specific characteristics (Table 2). Common outcome measures included attitudinal measures via surveys and behavioral records such as in-store dwelling time and sales figures (Table 1). \begin{table}
\begin{tabular}{l l l l} \hline \hline
**Source** & **Environment** & **Target Product** & **Behavioral Measures**1 \\ \hline [PERSON] (1989) [38] & Jewerly store & Jewerly & [PERSON], [PERSON], [PERSON] \\ [PERSON] (1995) [39] & Casino (gambling area) & Slot machines & [PERSON] (2001) [40] & Gift shop & Misc. gift items & [PERSON], [PERSON], [PERSON] \\ Schifferstein and Blok & Bookstore & Magazines & S \\ (2002) [26] & [PERSON] \& [PERSON] (2003) [41] & Shopping mall & Non-grocery & [PERSON] \\ [PERSON] et al. (2006) [37] & Fashion store & Clothing & [PERSON], [PERSON], [PERSON] \\ [PERSON] et al. (2007) [1] & Electrical store & Household appliances & T, A \\ (cookers and laundry area) & \multicolumn{1}{l}{} & \\ [PERSON] (2009) [24] & Bookstore & Books & [PERSON], [PERSON] \\ [PERSON] et al. (2011) [42] & Fashion store & Clothing & [PERSON], [PERSON], [PERSON] \\ [PERSON] and Janssens (2013) [43] & Clothing store & Clothing and Jewelry & [PERSON] et al. (2013) [44] & Bookstore & Books & [PERSON], [PERSON] \\ [PERSON] et al. (2013) [29] & Home decor & Plates, candles, baskets, etc. & [PERSON] \\ [PERSON] et al. (2014) [22] & Florist shop (indoor) & Plants and flowers & [PERSON] (2014) [45] & Fashion store & Sportswear & [PERSON], [PERSON] \\ Mazdharov, Block & & & \\ and [PERSON] (2015) [27] & Optics store & Sunglasses and prescriptions glasses & [PERSON] \\ [PERSON] et al. (2016) [46] & Fashion store(s) & Childrenswear & [PERSON], [PERSON] \\ [PERSON] \& [PERSON] (2017) [25] & Furnishing store & Furniture and accessories & [PERSON], [PERSON] \\ [PERSON] et al. (2018) [21] & Travel agency & Tour sales & [PERSON], [PERSON] \\ [PERSON] et al. (2020) [47] & Clothing store & Menswear & [PERSON] (2021) [2] & Fashion store & Clothing & S, T, A \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Overview of the literature included in this review, listed chronologically. 1 S = Sales volume, T = Dwell time, A = Attitude survey, O = Observations. Figure 2: Treemap of literature pertaining to aromachology, showing breakdown by scientific fields (N = 617, Source: Web of Science, Clarivariate Analytics, Core collection, Search terms: see Section 2). Fields with fewer than 15 records were omitted to improve legibility.