who designed the strange situation to measure attachment
Attachment measures The Strange Situation procedure was formulated to observe attachment relationships between a caregiver and children between the age of nine and 18 months. It was developed by Mary Ainsworth, a developmental psychologist[3] Originally it was devised to enable children to be classified into the attachment styles known as secure, anxious-avoidant and anxious-ambivalent. As research accumulated and atypical patterns of attachment became more apparent it was further developed by Main and Solomon in 1986 and 1990 to include the new category of disorganized/disoriented attachment.[4][5]
History of measurement systems in India Standard weights and measures were developed by the Indus Valley Civilisation.[1] The centralised weight and measure system served the commercial interest of Indus merchants as smaller weight measures were used to measure luxury goods while larger weights were employed for buying bulkier items, such as food grains etc.[5] Weights existed in multiples of a standard weight and in categories.[5] Technical standardisation enabled gauging devices to be effectively used in angular measurement and measurement for construction.[6] Uniform units of length were used in the planning of towns such as Lothal, Surkotada, Kalibangan, Dolavira, Harappa, and Mohenjo-daro.[1] The weights and measures of the Indus civilisation also reached Persia and Central Asia, where they were further modified.[7] Shigeo Iwata describes the excavated weights unearthed from the Indus civilisation: