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The spatial perceptions (i.e., ability to find hidden objects) of infants were tested and compared to their self-mobility and gender. Sixteen infants, eight males and eight females, were tested four times over a nine-week period. The testing was begun with each infant two to three weeks after the infant had begun to crawl.

Groups of agriculturalist/hunter-gatherers known as the Fremont inhabited the eastern Great Basin and Colorado Plateau from roughly A.D. 1-A.D. 1350 (Madsen 1989). Fremont groups used differing storage strategies through time and across space. Storage strategies included on-site and off-site storage facilities which were constructed above and/or below-ground. These forms of storage occurred at different frequencies and times throughout the Fremont's 1350 year time span. Researchers (Binford 1980, 1990; Keeley 1988; Soffer 1989; Testart 1982; Wills 1992; Young 1996) using examples from various parts of the world have noted a correlation between the degree of residential mobility and the use of storage. Lisa Young's (1996) model of storage and mobility posits that there is a direct correlation between the types of storage facilities a group uses and the level of mobility that they engage in. Generally, groups who use subterranean and/or off-site storage engage in a mobile or semi-sedentary settlement strategy and those who use on-site above-ground storage engage in a sedentary settlement strategy. This model was used to analyze mobility among the Fremont. To do so, a storage database was created which contained information on Fremont storage features such as type, location, date, and size. Analysis shows that there was a general trend of increasing sedentism through time for the Fremont, although this trend varies in degree through three general time periods and in three geographic areas. Further, the data was analyzed to determine whether there was significant spatial or temporal patterning of storage facilities. It was found that significant patterns do exist and are correlated in part with Fremont mobility.

Given the consistent findings in the development literature that fertility is associated with economic growth for individuals, families, and even influences a country's Gross Domestic Product, I explore to what degree motorcycles impact changes in fertility in rural Indonesia. I argue that motorcycles function as a "Distance Demolishing Technology" (Scott 2009:11) and therein empower individuals, particularly young rural women from lower socioeconomic groups who are socially and economically isolated, through increasing their access to labor markets, educational opportunities, non-familial social organizations, and more diverse social networks—key indicators in affecting fertility decisions identified in the existing literature. I examine this relationship in Indonesia where from 1990 to 2009, motorcycle ownership in Indonesia increased approximately 893% while the Indonesian population increased approximately 15% (Badan Pusat Statistik 2009). Using Demographic and Health Survey data across 1994, 1997, 2002, 2003 and 2007, I examine this relationship through a combination of multilevel regression models. My findings show a strong association between motorcycle ownership and a decrease in four different measures of fertility. Considering the importance of fertility in indicating individual and aggregate economic development—particularly in terms of increasing GDP and GNI per Capita—my findings indicate that sometimes even the simplest of technologies can be the "engines" of social and economic change.