Sexing the parental brain in shopping: an fMRI study

# Using Functional Magnetic Resonance Imaging to Study Parental Brain in Shopping

## Aims:

In this functional magnetic resonance imaging (fMRI) study, participants were presented with two conditions: (a) child-related products; (b) adult-related products. Participants decide whether to buy it or not within eight seconds.

## Methods

*fMRI:* This fMRI study investigated the shopping interactions of 45 parents, lying inside the scanner, making buy/not-buy decisions. Fathers are from sub-01 to sub-21 and mothers are from sub-22 to sub-45.

## General findings and importance:

Parental love acts on male vs. female brains differently, with overlapping yet distinct brain networks. Especially, while the PsychoPhysiological Interaction (or PPI) analysis showed that mothers recruited more cerebral regions than fathers when purchasing child vs. self item, the subcortical Periaquiductual Gray (PAG), highly implicated with parental love, was was more engaged in fathers (univariately), distinctive between fathers and mothers (multivariately), and correlated well with parents’ Relative Buying Indices (RBI). In addition, the parametric modulation analysis revealed parents’ ventromedial prefrontal cortex (vmPFC) responses as linearly modulated by decision times only when purchasing their own items, a sign that says ‘parents shop unsparingly for their children, but frugal when buying for themselves’.

## Sample Size

Forty-five human participants completed the experiments in the MRI scanner.

### Comments added by Openneuro Curators ###
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General Comments
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Where to discuss the dataset
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1) https://openneuro.org/datasets/ds006844/ See the comments section at the bottom of the dataset page.

Known Issues
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Price for each trial is shown in the picture's filename. (E.g. mc04_250.jpg is 250 NTD.)

Bids-validator Output
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# 利用功能磁共振成像研究购物场景下的父母大脑

## 研究目的：

本项功能磁共振成像（functional magnetic resonance imaging, fMRI）研究设置了两种实验条件：（a）儿童相关商品；（b）成人相关商品。要求被试在八秒内决定是否购买该商品。

## 研究方法

*功能磁共振成像：* 本项功能磁共振成像研究招募了45名处于扫描仪内的父母被试，考察其购物决策行为。其中，编号sub-01至sub-21为父亲，sub-22至sub-45为母亲。

## 主要研究发现与研究意义：

父母之爱对男性与女性大脑的作用机制存在差异，二者的脑网络既有重叠又各具特点。具体而言，心理生理交互（PsychoPhysiological Interaction, PPI）分析结果显示，相较于购买自身商品时，母亲在购买儿童商品时激活的脑区范围较父亲更广；而与父母之爱高度相关的皮层下导水管周围灰质（Periaquiductual Gray, PAG），在父亲脑中的单变量激活程度更高，且在多变量分析中呈现出显著的性别差异，同时该脑区激活程度与父母的相对购买指数（Relative Buying Indices, RBI）存在良好相关性。此外，参数调制分析结果表明，仅在购买自身商品时，父母的腹内侧前额叶皮层（ventromedial prefrontal cortex, vmPFC）激活程度会随决策时间呈线性变化，这一结果印证了“父母为子女购物时不惜成本，而为自身购物时则更为节俭”的现象。

## 样本量

共45名人类被试在磁共振扫描仪中完成了实验。

### OpenNeuro 管理员补充注释 ###
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通用评论
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数据集讨论渠道
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1) https://openneuro.org/datasets/ds006844/ 请前往数据集页面底部的评论区进行讨论。

已知问题
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每个试次的商品价格标注在图片文件名中。例如：mc04_250.jpg 代表该商品售价为250新台币（NTD）。

BIDS验证器输出结果
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